I'm not a programmer. I'm really starting from scratch

I need to draw a picture by overlaying many png files. To describe what I want the program to do I'll use a car as an example and pretend that I'm a car salesman (I'm not)

I'm a car salesman and I want to show people the car that they want to buy. I want to assemble a picture of the car depending on what color and accessories they want

I'll have several transperancies of diffent items such as

green car
red car
blue car
mag wheels
standard wheels
chrome bumper
black bumper
tinted windows
clear windows

I'd like a Javascript program that the customer can draw a green car with standard wheels and tinted windows and a chrome bumper

Has anyone seen a website that does similar to what I described?