int screen_size = 700;

void setup() {
	size(screen_size, screen_size);
	colorMode(RGB);
	background(20,1,55);
	noStroke();
	smooth();
	frameRate(16);
}

void draw() {
	int box_size;
	int total_mesh = 20;
	int base_color = 50;
	int y_color = 100;
	box_size = screen_size / total_mesh;

	for(int i=0;i<total_mesh;i++){
		for(int j=0;j<total_mesh;j++){
			int e = int(random(5));
			switch(e){
				case 2:        
					float r_color = random(8,y_color);
					fill(base_color + r_color,10,40);
					ellipse((j+0.5)*box_size, (i+0.5)*box_size, box_size, box_size);
					break;
			}
		}
	}
}