​

function setup() {

  bg=(255);

  r = random(0, 255);

  g = random(0, 255);

  b = random(0, 255);

​

  space = 33; //step

  brushMinSize = 10;

  brushMaxSize = 100;

  colorVariability=12;

  opacity = 1;

  createCanvas(windowWidth, windowHeight);

  background(bg);

    x = width / 2;

    y = height / 2;

}

​

function draw() {

​

  // randomly move line

  var randomValue = random();

  if (randomValue < .25) {

   x = x-space;

  } else if (randomValue < .5) {

   x = x+space;

  } else if (randomValue < .75) {

   y = y-space;

  } else {

   y = y+space;

  }

​

  // wrap around left and right sides

  if (x < 0) {

    x = width;

  } else if (x > width) {

    x = 0;

  }

​

  // wrap around top and bottom sides

  if (y < 0) {

    y = height;

  } else if (y > height) {

    y = 0;

  }

​

  // randomly change color

  r += random(-1*colorVariability, colorVariability);

  g += random(-1*colorVariability, colorVariability);

  b += random(-1*colorVariability, colorVariability);

​

  // don't let values go outside 0-255 range

  r = constrain(r, 0, 255);

  g = constrain(g, 0, 255);

  b = constrain(b, 0, 255);

​

  var bushSizeX = random(brushMinSize,brushMaxSize);

  var bushSizeY = random(brushMinSize,brushMaxSize);

  //Brush head

  noStroke();

  fill(r, g, b, random(0,50));

  rect(x,y,(random(brushMinSize,brushMaxSize), (random(brushMinSize,brushMaxSize))));

  rect(x+random(brushMinSize/2),y-random(brushMinSize/2),(random(brushMinSize,brushMaxSize)/random(2,5), (random(brushMinSize,brushMaxSize)/random(2,5))));

  rect(x+random(brushMinSize/2),y+random(brushMinSize/2),(random(brushMinSize,brushMaxSize)/random(2,5), (random(brushMinSize,brushMaxSize)/random(2,5))));

  rect(x-random(brushMinSize/2),y-random(brushMinSize/2),(random(brushMinSize,brushMaxSize)/random(2,5), (random(brushMinSize,brushMaxSize)/random(2,5))));

  rect(x-random(brushMinSize/2),y+random(brushMinSize/2),(random(brushMinSize,brushMaxSize)/random(2,5), (random(brushMinSize,brushMaxSize)/random(2,5))));

}