docs: replace loop length with segments and declare move in repeating-with-loops tutorial

Author: skyash-dev

src/content/tutorials/en/repeating-with-loops.mdx

@@ -199,7 +199,7 @@ Above `setup()`:
 In `draw()`:
 
 - After the code that draws the finish line, declare a new local variable `x` to position all the body segments: `let x = circX;`
-- Add a *for loop* using: `for (let i = 0; i < length; i += 1) { }`
+- Add a *for loop* using: `for (let i = 0; i < segments; i += 1) { }`
   - A *for loop* will repeat the code we write inside the curly brackets multiple times. 
   - Move the lines of code that draw the `circle()` into the curly brackets of the *for loop*.
 - After the for loop, add: `circX += spacing` 
@@ -936,7 +936,7 @@ function moveCaterpillars() {
   for (let i = 0; i < numCaterpillars; i += 1) {
     //Give each caterpillar a
     //random speed.
-    move = random(5, 30);
+    let move = random(5, 30);
     caterpillarEnds[i] += move;
   }
 }
@@ -1001,7 +1001,7 @@ function moveCaterpillars() {
   for (let i = 0; i < numCaterpillars; i += 1) {
     //Give each caterpillar a
     //random speed.
-    move = random(5, 30);
+    let move = random(5, 30);
 
     // Update caterpillars' x-coordinates
     caterpillarEnds[i] += move;