void setup() {
  size(450, 100);
  flag(25,25,80,60,color(0), color(227,0,19), color(255,205,70));     // Germany
  flag(125,25,80,60,color(255), color(7,32,245), color(255,0,23));    // Russia
  flag(225,25,90,60,color(178,25,43), color(255), color(31,72,135));  // Netherlands
  flag(325,25,90,60,color(243,36,61), color(255), color(243,36,61));  // Austria
}

/*
   Render a w-by-h flag with top-left corner (x,y).
   The flag has three horizontal stripes having
   colors a, b, and c, respectively from top to bottom.
*/
void flag(int x, int y, int w, int h, color a, color b, color c) {
  pushStyle();
  noStroke();
  fill(a);
  rect(x, y, w, h/3);
  fill(b);
  rect(x, y+h/3, w, h/3);
  fill(c);
  rect(x, y+2*h/3, w, h/3);
  stroke(0);
  noFill();
  rect(x, y, w, h);
  popStyle();
}