createCanvas(windowWidth, windowHeight);
background(49, 157, 245);
line(0, 0, mouseX, mouseY);
line(width, 0, mouseX, mouseY);
line(0, height, mouseX, mouseY);
line(width, height, mouseX, mouseY);
line(width/2, 0, mouseX, mouseY);
line(width, height/2, mouseX, mouseY);
line(width/2, height, mouseX, mouseY);
line(0, height/2, mouseX, mouseY);
line(width/4, 0, mouseX, mouseY);
line(width-width/4, 0, mouseX, mouseY);
line(width, height/4, mouseX, mouseY);
line(width, height-height/4, mouseX, mouseY);
line(width/4, height, mouseX, mouseY);
line(width-width/4, height, mouseX, mouseY);
line(0, height/4, mouseX, mouseY);
line(0, height-height/4, mouseX, mouseY);