Ingenious program, this, from PETER DOEL. It produces a giant printout of whatever you've got on the screen, using eight sheets of normal continuous stationery. The printer uses the computer's normal character set, so that when you look at the printout close up you can barely make out what it is. But stick the pages together, walk away 20 feet, then turn round and look and...WOW!
You can change the 'contrast' in your giant picture by altering the characters separated by commas in line 240 - each of these characters corresponds to one of the 16 possible screen colours.
The program starts at line 100, and if you just run it as it is, it will simply produce a magnified printout of the text that's on the screen. A better idea is to add some more program lines below line 100 to create something interesting on screen, even if it's just loading in a loading screen from a game.
10 MODE 0:FOR i=2 TO 13: PEN i:PRINT" AMSTRAD ACTION":PRINT"":NEXT
Adding this line creates one very simple screen display for turning into a poster. You could replace it with any other graphics routine, for example one which loads in a screen display from a graphics package or (if you're clever) the title screen of a game.