function setup() {
  createCanvas(800, 800);
  noFill();
  shapeColor = color(0);
}
Drawing tool for creating moire effect compositions using
rectangles of various widths, lengths, angles and colours.

MOUSE
mouse               : place moire effect rectangle

KEYS
1                   : set color to red
2                   : set color to green
3                   : set color to blue
4                   : set color to black
arrow up            : increase rectangle width
arrow down          : decrease rectangle width
s                   : save png

CONTRIBUTED BY
[Niels Poldervaart](http://NielsPoldervaart.nl)