locomotiveRoses

let a =4.2,
    b = 1.96,
    c = 1.6,
    k = 64,
    m = 6,
    counter = 20;//constants
function setup() {
  createCanvas(600, 600);
}
function draw() {
  translate(width/2,width/2);//orgin in center
  t = frameCount/1000
  fill(100*sin(frameCount),200*sin(frameCount),180*sin(frameCount))
  background(100,140,180,5);
  theta = (t);
  for (let i=0;i<counter;i++){
    r = a + b*cos(k*(theta+i))+ c*cos(m*(theta +i));
    x = 20*r*cos(theta+i)
    y = 20*r*sin(theta+i)
    if(i>0){
      stroke(0.1)
      line(x,y,x1,y1);
    }
    x1=x;
    y1=y;
  }
}
function mousePressed(){
  background(random(120,140),random(120,240),random(120,240),150)
  a =random(2,10);
  b = random(0.1,3);
  c = random(0.1,5);
  k = random(5,80);
  m = int(random(1,20))
}