how to send an alert in javascript
//you can either do this:
function mousePressed() {
//you can have any message
alert("I'm the best");
}
//or you can do this:
function keyPressed() {
//you can do any key
if (keyCode === UP_ARROW) {
//and any message
alert(number = random(0, 500));
}
}
//or you can do an (if) statement
if(x > width) {
alert("yay you did it");
}