diff --git a/cbpi4ui/CBPI-ConfigForTesting/config.7z b/cbpi4ui/CBPI-ConfigForTesting/config.7z
new file mode 100644
index 0000000..24b78ff
Binary files /dev/null and b/cbpi4ui/CBPI-ConfigForTesting/config.7z differ
diff --git a/cbpi4ui/src/components/dashboard/DashboardContext.js b/cbpi4ui/src/components/dashboard/DashboardContext.js
index 223a9e4..676d75c 100644
--- a/cbpi4ui/src/components/dashboard/DashboardContext.js
+++ b/cbpi4ui/src/components/dashboard/DashboardContext.js
@@ -105,7 +105,6 @@ export const DashboardProvider = ({ children }) => {
   };
 
   const update_prop = (id, key, value) => {
-    
     const data = [...elements2];
     const index = data.findIndex((e) => e.id === selected.id);
     data[index].props[key] = value;
@@ -114,10 +113,28 @@ export const DashboardProvider = ({ children }) => {
 
   };
 
-  const update_path_condition = (id, data) => {
+  const update_path_condition = (id, data, direction) => {
+    const index = pathes.findIndex((e) => e.id === id);
+    const temp_pathes = [...pathes];
+    if(direction === "left")
+    {
+      temp_pathes[index].condition.left = data;
+    }
+    if(direction === "right")
+    {
+      temp_pathes[index].condition.right = data;
+    }
+    setPathes([...temp_pathes]);
+  };
+
+  // New method for updating path animation condition based on boolean expression 
+  const update_path_condition_exp = (id, direction, data) => {
     const index = pathes.findIndex((e) => e.id === id);
     const temp_pathes = [...pathes];
-    temp_pathes[index].condition = data;
+    if(direction === "leftExpression")
+        temp_pathes[index].condition.leftExpression = data;
+    if(direction=== "rightExpression")
+      temp_pathes[index].condition.rightExpression = data;
 
     setPathes([...temp_pathes]);
   };
@@ -206,6 +223,7 @@ export const DashboardProvider = ({ children }) => {
       update_default_prop,
       update_prop,
       update_path_condition,
+      update_path_condition_exp, // New Method added for the boolean expression
       update_coordinates,
       setDraggable,
       update_path,
diff --git a/cbpi4ui/src/components/dashboard/DashboardLayer.js b/cbpi4ui/src/components/dashboard/DashboardLayer.js
index 8dbcfc7..4933581 100644
--- a/cbpi4ui/src/components/dashboard/DashboardLayer.js
+++ b/cbpi4ui/src/components/dashboard/DashboardLayer.js
@@ -152,9 +152,10 @@ const PathSettingsItem = ({ item, checked, handleToggle }) => {
         <Checkbox edge="start" checked={checked.indexOf(item.id) !== -1} tabIndex={-1} color="primary" disableRipple inputProps={{ "aria-labelledby": "A" }} />
       </ListItemIcon>
       <ListItemText primary={item.name} />
-
     </ListItem>
   );
+
+
 };
 
 const PathSettings = () => {
@@ -176,14 +177,19 @@ const PathSettings = () => {
       const currentIndex = checked.indexOf(value);
       const newChecked = [...checked];
 
-      if (currentIndex === -1) {
+      if (currentIndex === -1) 
+      {
         newChecked.push(value);
-      } else {
+      } 
+      else 
+      {
         newChecked.splice(currentIndex, 1);
       }
       setChecked(newChecked);
-      actions.update_path_condition(selected_id, {left: newChecked, right: checkedRight});
-    } else {
+      actions.update_path_condition(selected_id, {left: newChecked, right: checkedRight},direction);
+    } 
+    else 
+    {
       const currentIndex = checkedRight.indexOf(value);
       const newChecked = [...checkedRight];
 
@@ -193,7 +199,19 @@ const PathSettings = () => {
         newChecked.splice(currentIndex, 1);
       }
       setCheckedRight(newChecked);
-      actions.update_path_condition(selected_id, {left: checked, right: newChecked});
+      actions.update_path_condition(selected_id, {left: checked, right: newChecked},direction);
+    }
+  };
+
+  // Handle change of the boolean expression for path animation.
+  const data = useModel(selected_id);
+  const handleChange = (e, direction) => {
+    if (direction === "left")
+    {
+      actions.update_path_condition_exp(selected_id, "leftExpression", e.target.value);
+    }
+    else{
+      actions.update_path_condition_exp(selected_id, "rightExpression", e.target.value);
     }
   };
 
@@ -205,6 +223,11 @@ const PathSettings = () => {
     return "";
   }
 
+  const item = state.pathes.find((e) => e.id === selected_id);
+
+
+// Add a TextField for adding the booleanExpression
+  var helperTextExpression = "sample expression : (\"actor1\" && \"actor2\") || (\"actor2\" && \"actor3\") \n don't forget the quote";
   return (
     <>
       <div
@@ -221,12 +244,15 @@ const PathSettings = () => {
             <PathSettingsItem item={item} checked={checked} handleToggle={handleToggle} />
           ))}
         </List>
+        <TextField label="Condition expression" helperText={helperTextExpression} fullWidth value={item?.condition?.leftExpression} onChange={(e) => handleChange(e, "left")} />
+
         Flow Right
         <List disableGutters={true} dense component="nav" aria-label="main mailbox folders">
           {actor.map((item) => (
             <PathSettingsItem item={item} checked={checkedRight} handleToggle={(id) => handleToggle(id, "right")} />
           ))}
         </List>
+        <TextField label="Condition expression" helperText={helperTextExpression} fullWidth value={item?.condition?.rightExpression} onChange={(e) => handleChange(e, "right")} />
       </div>
     </>
   );
diff --git a/cbpi4ui/src/components/dashboard/widgets/Path.js b/cbpi4ui/src/components/dashboard/widgets/Path.js
index f7b3998..a5daec7 100644
--- a/cbpi4ui/src/components/dashboard/widgets/Path.js
+++ b/cbpi4ui/src/components/dashboard/widgets/Path.js
@@ -10,9 +10,10 @@ export const Path = ({ id, coordinates, condition = null, stroke = 10, max_x = 4
   const [dragging, setDragging] = useState(false);
   const [origin, setOrigin] = useState({ x: 0, y: 0 });
   const [active, setActive] = useState(false);
-  const [flowLeft, setFlowLeft] = useState(false)
-  const [flowRight, setFlowRight] = useState(false)
- 
+  const [flowLeft, setFlowLeft] = useState(false);
+  const [flowRight, setFlowRight] = useState(false) ;
+  const[rightExpression, SetFlowExpRight] = useState(false); // rightExpression and useState Hook for SetFlowRightExp
+  const[leftExpression, SetFlowExpLeft] = useState(false);   // leftExpression and useState Hook for SetFlowleftExp
 
   useEffect(() => {
     
@@ -21,18 +22,106 @@ export const Path = ({ id, coordinates, condition = null, stroke = 10, max_x = 4
       return obj;
     }, {});
 
+    // Add a cache of actor states by name, used for calculate the expression
+    const actor_cacheFromName = actor.reduce((obj, item) => {
+      obj[item.name] = item.state;
+      return obj;
+    }, {});    
+
     const p = state.pathes.find((e) => e.id === id);
-    if (!p.condition?.left || p.condition?.left.length === 0) {
-      setFlowLeft(false)
-    } else {
-      setFlowLeft(p.condition?.left.reduce((sum, next) => sum && actor_cache[next], true));
-    }
 
-    if (!p.condition?.right || p.condition?.right.length === 0) {
-      setFlowRight(false)
-    } else {
+    
+    // Add a control to check if a boolean expression is added in path properties
+    // If an expression is present in the left or right direction, we don't check the checked value for calculating animation state. 
+    if((!p.condition?.leftExpression || p.condition?.leftExpression.length === 0) 
+        && (!p.condition?.rightExpression || p.condition?.rightExpression.length === 0))
+    {
+      if (!p.condition?.left || p.condition?.left.length === 0) 
+      {
+        setFlowLeft(false)
+      } 
+      else 
+      {
+        setFlowLeft(p.condition?.left.reduce((sum, next) => sum && actor_cache[next], true));
+      }
+
+      if (!p.condition?.right || p.condition?.right.length === 0) 
+      {
+        setFlowRight(false)
+      }
+      else 
+      {
       setFlowRight(p.condition?.right.reduce((sum, next) => sum && actor_cache[next], true));
+      }
     }
+
+    // If the leftexpression value is entered in the path property.
+    // TODO : variable count optimisation
+    if(p.condition?.leftExpression)
+    {
+      // split the expression
+      var actorsId = p.condition.leftExpression.split("\"");
+      var bStateAction = false;
+      var boolExpressionLeft;
+      boolExpressionLeft = p.condition.leftExpression
+
+      // For each part of the string, we check if this is an actor name, if so we replace the actor name by the resulting state.  
+      for(var actorId of actorsId)
+      {
+        // Check if we process an actorId
+        if(typeof actor_cacheFromName[actorId] === "boolean") 
+        {            
+          boolExpressionLeft = boolExpressionLeft.replace('\"'+ actorId + '\"', actor_cacheFromName[actorId].toString());
+        }
+      }
+      // Evaluation of the expression
+      // TODO : in order to be safer, plane to use something else than eval (in the craftbeerpi context, i'm not sur it can cause any security problem : TO BE CONFIRMED)
+      try 
+      {
+        bStateAction = eval(boolExpressionLeft);
+        console.trace("Right, Eval de : " + boolExpressionLeft  + "  Result = " + bStateAction.toString());
+        setFlowLeft(bStateAction, true);
+      } 
+      catch (error) 
+      {
+        console.error("Evaluation of boolean expression failure : check your boolean expression for path animation");
+      }
+    }
+    
+    // If the rightExpression value is entered in the path property.
+    // TODO : variable count optimisation
+    if(p.condition?.rightExpression)
+    { 
+      // split the expression
+      var actorsId =p.condition.rightExpression.split("\"");
+      var bStateAction = false;
+      var boolExpressionRight;
+      boolExpressionRight = p.condition.rightExpression
+
+      // For each part of the string, we check if this is an actor name, if so we replace the actor name by the resulting state.  
+      for(var actorId of actorsId) 
+      {
+        // Check if we process an actorId
+        if(typeof actor_cacheFromName[actorId] === "boolean") // Check if this is an actor ID or just an operator.
+        {
+          boolExpressionRight.replace('\"' +  actorId + '\"', actor_cacheFromName[actorId].toString());
+        }
+      }
+      // Evaluation of the expression
+      // TODO : in order to be safer, plane to use something else than eval (in the craftbeerpi context, i'm not sur it can cause any security problem : TO BE CONFIRMED)
+      bStateAction = eval(boolExpressionRight);
+      if (bStateAction != undefined)
+      {
+        console.trace("Left, Eval de : " + boolExpressionLeft + "  Result = " + bStateAction.toString());
+        setFlowRight(bStateAction, true);
+      }
+      else
+      {
+        console.trace("Evaluation of boolean expression failure : check your boolean expression for path animation");
+      }
+    }
+
+
   }, [actor]);
 
   const draggable = state.draggable;
diff --git a/cbpi4ui/src/components/dashboard/widgets/config.js b/cbpi4ui/src/components/dashboard/widgets/config.js
index 21e230a..26c3877 100644
--- a/cbpi4ui/src/components/dashboard/widgets/config.js
+++ b/cbpi4ui/src/components/dashboard/widgets/config.js
@@ -3,7 +3,7 @@ import QueryBuilderIcon from '@material-ui/icons/QueryBuilder';
 import ShowChartIcon from '@material-ui/icons/ShowChart';
 import TextFieldsIcon from '@material-ui/icons/TextFields';
 import ToggleOffIcon from '@material-ui/icons/ToggleOff';
-import { CBPiCalculatorIcon, CBPiControlIcon, CBPiKettle, CBPiKettle2Icon, CBPiLedIcon, CBPiLiquidIcon, CBPiSensorIcon, CBPiSVGIcon, CBPiTankIcon, CBPiThermometerIcon } from '../../util/icons/CBPiSensorIcon';
+import { CBPiCalculatorIcon, CBPiControlIcon, CBPiKettle, CBPiKettle2Icon, CBPiLedIcon, CBPiLiquidIcon, CBPiPipeIcon, CBPiSensorIcon, CBPiSVGIcon, CBPiTankIcon, CBPiThermometerIcon } from '../../util/icons/CBPiSensorIcon';
 import { DashboardButton } from "./Button";
 import { Calculator } from "./Calculator";
 import Chart from "./Chart";
@@ -12,6 +12,7 @@ import CustomSVG from "./CustomSVG";
 import { KettleControl } from "./KettleControl";
 import { Led } from "./Led";
 import { Liquid } from './Liquid';
+import {Path} from './Path';
 import { SensorData } from "./SensorData";
 import Steps from "./Steps";
 import KettleSVG from "./svg/kettle.svg";
@@ -163,9 +164,7 @@ export const widget_list = [
       { name: "height", default: 40, type: "number" },
       { name: "sensor", default: "", type: "sensor" }
     ],
-  }
-  
-
+  },
   
 ];