# Exercise: Loops

### Exercise 1

Reproduce the drawing below using one for loop:

10 lines, 500×500 px canvas.

Tips:
.Don’t start coding! Break down the problem on paper first
.Consider using a variable for the lines coordinates like startX, startY and endX, endY.
.Try to draw parallel lines first

### Exercise 2

Reproduce the dynamic sketch captured below:

20 lines on each side, 500×500 px canvas.

### Exercise 3

Reproduce the drawing below using nested for loops:

9×9 circles. 50px of distance between the centers, 500×500 px canvas.

Tips:
. break down the problem in different sub-problems
. make a tiling of identical circles first
. implement a variable diameter and figure out a relation with the index variable
. do the same with the alpha channel

### Exercise 4

Reproduce the drawing below using nested for loops and appropriate variables for every quantity (eg. number of concentric circles):

Canvas 500x500px. Rows 4, columns 4, target diameter 80px, distance between centers 100px, target inner circles: 10.

### Exercise 5

Reproduce the pattern using nested loops and random:

### Exercise 6

Reproduce this animation by psychedelic gif artist dvdp. You’ll need arc(), degrees() and radians() may help: