void setup() {
	size(700, 700);
	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 = 700 / total_mesh;

	for(int i=0; i < total_mesh; i++){
		for(int j=0; j < total_mesh; j++){
                        float xx = (j+0.5)*box_size;
                        float yy = (i+0.5)*box_size;
			int e = int(random(5));
			switch(e){
				case 2:        
					float r_color = random(8,y_color);
					fill(base_color + r_color,10,40);
					ellipse(xx, yy, box_size, box_size);
					break;
			}
			if ( (xx-20 < mouseX) && (xx+20 > mouseX)){
     			    if ( (yy-20 < mouseY) && (yy+20 > mouseY)){
					fill(255,255,255);
					ellipse(xx, yy, box_size, box_size);
       
                            }
                        }
		}
	}
}