//Aamrun, 3rd July 2022

void drawPanel(int startColour,int endColour,int bars,int startY){
  int rectWidth = width / bars,rectHeight = height / 4, startX = 0,increment;

  increment = (endColour - startColour)/(bars-1);

  for(int i = 0;i < bars;i++){
    fill(startColour + i*increment);
    rect(startX + i*rectWidth,startY,rectWidth,rectHeight);
  }
}

void setup(){
  size(1280,960);

  drawPanel(0,255,8,0);
  drawPanel(255,0,16,height/4);
  drawPanel(0,255,32,height/2);
  drawPanel(255,0,64,3*height/4);
}