I have an worm java game ,but i need to modify in worm classes,in draw method to change the form of head and tail of the wrom.Together have an oval form,but i need to change it,in my case the worm head should be in the form of a triangle, while the tail should be in square shape

I upload my code in google drive:

https://drive.google.com/file/d/1luxwp9h486kca1bxYMUCcuB4q8OhB9MT/view

Thanks