Infinite Spiral

float num = 0;

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void setup(){

  fullScreen();

  noFill();

}

​

void draw(){

  background(255);

  translate(width/2, height/2);

  for(int i = 0; i < 360; i+=15){

    // The tan function allows the shapes to come back to the middle. (Look at tan graph)

    float a = tan(radians(i/2+num))*75;

    strokeWeight(abs(1+a/10));

    // If the values of tan are greater then 0, draw the shape.

    if(a > 0) ellipse(sin(radians(i*4))*a, cos(radians(i*4))*a, a, a);

  }

  num+=0.3;

}