// 10PRINT rosette Processing 3 code, thanks to @shiffman !

10PRINT 'rosette'.pde

// 10PRINT rosette Processing 3 code
// thanks to @shiffman !

float r=20;
float s=10;

void setup() {
  size(300, 300);
  frameRate(1);
}

void draw() {
  background(72, 58, 170);
  translate (width/2, height/2);
  scale (1, -1);
  strokeWeight(1.5);
  stroke (134, 122, 222);
  for (int i=0; i<60; i++) {
    for (int j=0; j<10; j++) {
      stroke (134, 122, 222, 255-15*j);
      float d = (random(1)>0.5)?-1:1;
      float a = (i-d/2)*2*PI/60;
      float b = (i+d/2)*2*PI/60;
      line ((r+j*s)*sin(a),(r+j*s)*cos(a), 
            (r+(j+1)*s)*sin(b),(r+(j+1)*s)*cos(b));
    }
  }
}