我需要能够覆盖图片和面板（数学方程式）

I am using this class to make an image have different states. At first, the image is dark grey (so you can't see it). I want the image to be clickable and once clicked a math equation will appear. Once the equation is answered the full image will appear. Also, I have another class that splits an image into separate pieces. So basically all of those separate pieces inherit this method. So it's a picture that has been divided into separate images (let's say 4 images, so that means 4 math problems). How would I go about doing this. I've tried multiple methods (that I haven't included in this because it looked like a rats nest), but haven't been able to get it work. I've tried implementing I am using this class to make an image have dif