DotOverGradient

int num = 60;

int[] x = new int[num];

int[] y = new int[num];

​

color blue = color(95, 203, 241);

color yellow = color(239, 65, 54);

​

​

void setup() {

  size(1980/2, 1080/2, P2D);

  smooth();

  noStroke();

}

​

void draw() {

  //background(0);

  gradientRect(0, 0, width, height, blue, yellow);

​

​

  for (int i = x.length-10; i>0; i--) {

    x[i] = x[i-1];

    y[i] = y[i-1];

  }

  x[0] = mouseX;

  y[0] = mouseY;

  for (int i = 0; i < x.length; i++) {

    fill(i*4);

    ellipse(x[i], y[i], 40, 40);

  }

}

void gradientRect(int x, int y, int w, int h, color c1, color c2) {

  beginShape();

  fill(c1);

  vertex(x, y);

  vertex(x, y+h);

  fill(c2);

  vertex(x+w, y+h);

  vertex(x+w, y);

  endShape();

}