i have to make a pac man $2$d animation using Processing code for homework.

It could be a chomping pac man, ms pac man etc. The pacman should eat dots in a short looped animation to show you understand the fundementals of animating. I have had an expert make this code but it did not work well. Game functionality also gives extra marks and it doesnt have to be a long detailed code. It is said to be a simple assesment but I am struggling with it$.$