Working towards having a decent intro screen.
>>> Prompt:
Given HTML canvas and javascript.
I want to be able to click on objects on the canvas, but the canvas might be resized
with e.g. 'width: 100%' and repositioned (e.g. 'margin: 0 auto') using CSS so exact pixels will not work.
Make it a function to convert the screen coordinate to a canvas coordinate.
This time, give me only the code, I don't need explanations.