c++ screensaver

ok this is my first post. i have a pretty good understanding of c++ and little understanding of BASIC so pretty much all i want to learn how to do with basic is learn how to make a screensaver....

my dad used to program in college and i want to do what he did. he said that he named 4 (or more but in this case just 4) random points on a grid and drew lines to them to make the shape of an hourglass and those four points would move either up, down, left, or right 1 space on the grid to make the lines stretch all over the place. also every time the line hit the edge of the screen it would bounce off and change to a random color. could anyone help or at least direct me to a tutorial on how i could manage to do this