Do you know what a pixel is? Your computer screen has thousands of tiny dots that can each be programmed to be a different colors.
Here’s how the “point(x,y)” command works. The top and left hand corner of the screen is the "origin", or where you start. The “x” specifies how many pixels over from the origin the point will be drawn. The “y” specifies how many pixels down from the origin the point will be drawn. For example “point(3,9)” would draw a point over 3 pixels and down 9 pixels. The command "point(100,200)" would draw a point over 100 pixels, and down 200 pixels.