Dan showed me how to change my program to not flicker (constantly redraw the joystick plot) by having it always check the state of where it just was before plotting.
Now the plot moves around the screen and looks MUCH better.
If anyone's still reading ... I also changed the target point to white so it is easier to see/differentiate vs. the joystick point, and I added a line that re-generates the "random" number is R=19 or 20 because one time I played and it automatically jumped the "you won" screen ... I realized if the number is 19 or 20 then it could conflict with the default centered status of the joystick and you don't get the chance to play. So, this stage of the game is mostly finished. Next I have to work on making the sprite (robot status indicator) into something more than just a single point. Dan gave me some tips for that. Then I'll add more obstacles. Some of them will cost you points. Some of them will give you points. One of them finds the kitten... The hardest part -- maybe easy on paper, not so much in reality -- will be merging in the Lego robot code. and figuring out how much real-life robot movement to equate to on-screen sprite movement. ________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)(3) educational non-profit evan@vcfed.org (646) 546-9999 www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation instagram.com/vcfederation