interactive form

Good morning,
I use abode acrobrate for the first time and I just created a form for patients, in this form I ask them to place me on images (4 different represent the human body, front of back and sides)
I would like him to be able to choose the color of the cross, red or blue and to be able to place it at the place of their clicks this famous cross, moreover it is possible to place several of them and to erase them as they wish, but I do not know how to do-you have any idea?
I tried to embed JavaScript, but nothing works... (I’m a complete beginner after all)