Various BASIC
Before you acually start to learn any real BASIC, you should learn what a few of the commands are. These commands should help you on your way to programming with BASIC.
randint(
Randint( is a way of generating a random number. It is used like this:randint(1,7)->A
It will chose a number from 1-7 because that is what I put. First the lowest number (1) then the highest (7). Then, I stored it as A (read the 'variable' tutorial).
Sto->
This is the 'store' key. I will use '->' to show it in this site because I can't actually make it. It stores something as a variable (read 'variable' tutorial).pxl-of/pxl-off
These stand for pixel on or pixel off. This simply means 'turn on a little black dot at the given point' (read 'output(' tutorial).