If with Else

sketch.js

var c;

function setup() {
  createCanvas(500,500);
  c = color(255,255,255);
}

function draw() {
  if (mouseY > height/2) {
    c = color(255,0,0);
  }
  else {
    c = color(0,255,255);
  }
  
  fill(c);
  
  if (mouseX > width/2) {
    ellipse(mouseX, mouseY, 10, 10);
  }
  else {
    rect(mouseX, mouseY, 10, 10);
  }

  
  
}