sine3

int elements = 100;
int[] colors = new int[elements];
color[] palette = {
  #490A3D, #BD1550, #E97F02, #F8CA00, #8A9B0F
}
;
float sz, theta, offset, x, y, l;

void setup() {
  size(500, 300);
  sz=width/elements;

  for (int i=0; i<elements; i++) {
    colors[i] = (int) random(0, 5);
  }
}

void draw() {
  background(20);
  stroke(220);
  line(0, height/2, width, height/2);

  for (int i=0; i<colors.length; i++) {
    offset = (TWO_PI/elements)*i*3;
    x = sz/2 + i*sz;
    y = map(sin(theta+offset), -1, 1, 0, 1);
    if (y>0.5) {
      l = 100;
    } else {
      l = 10;
    }
    stroke(palette[colors[i]]);
    strokeWeight(sz);
    line(x, height/2 - l/2, x, height/2 +l/2);
  }
  theta += 0.0523*2;

  //if (frameCount%2==0 && frameCount<61) saveFrame("image-###.gif");
}