Update rectangle instructions

bootcamp_content/projects/drawing/exercises/rainbow/config.json

@@ -21,7 +21,7 @@
           "function": "main",
           "checks": [
             {
-              "name": "getRectangleAt(0, 0, undefined, 100)",
+              "name": "getRectangleAt(1, 0, undefined, 100)",
               "matcher": "toExist",
               "error_html": "The first rectangle is missing"
             },

bootcamp_content/projects/drawing/exercises/rainbow/introduction.md

@@ -16,11 +16,14 @@ The rainbow is made up of lots of bars.
 
 - The rainbow is made up of `100` bars, each with a width of `1`, starting at the top and being `100` high.
 - The first bar should have an `x` of 0, and the final bar should have an `x` of 99.
-- You need to set variables for `x` and for the `hue` of the color (both starting at `0`)
+- You will need a variable for `x`. When choosing its initial value, remember that it will be increased in the `repeat` block BEFORE drawing.
+- You also need a variable for the `hue` of the color (set initially to `0`)
 - You need to write a repeat loop that repeats 100 times.
 - In each iteration of the repeat loop you need to increase `x` by 1 and increase the hue by `3`.
 - You then need to use the `fill_color_hsl` (with saturation and luminance set around 50), and `rectangle` functions to draw.
 
+Use the scrubber (the play bar at the bottom right) and the toggle switch next to it to check the inputs that are going into the functions.
+
 The functions used in this exercise are:
 
 - `rectangle(x, y, width, height)`

bootcamp_content/projects/drawing/exercises/rainbow/stub.jiki

@@ -1,9 +1,11 @@
-// TODO: Set the variables
-set x to 0
+// TODO: Set the x variable to a good initial value
+// Remember that will be updated BEFORE you draw.
+set x to 
+
 set hue to 0
 
 repeat 100 times do
-  // Change the variables
+  // TODO: Change the variables
 
   // TODO: Update the color