Sketch_4

//size(width, height);

size(400, 500);

​

//backgrund(red, green, blue);

background(265, 265, 265);

​

noStroke();

background(51);

color from = color(130, 0, 0);

color to = color(0, 102, 153);

color interA = lerpColor(from, to, .33);

color interB = lerpColor(from, to, .66);

fill(from);

rect(0, 0, 100, 500);

fill(interA);

rect(100, 0, 100, 500);

fill(interB);

rect(200, 0, 100, 500);

fill(to);

rect(300, 0, 100, 500);

​

​

// No fourth argument means 90% opacity.

​

// 255 means 90% opacity.

fill(255,0,0,255);

ellipse(200,80,350,40);

​

// 75% opacity.

fill(255,0,0,191);

ellipse(200,190,350,50);

​

// 55% opacity.

fill(255,0,0,127);

ellipse(200,290,350,60);

​

// 25% opacity.

fill(255,0,0,63);

ellipse(200,390,350,70);