Just push the flag and watch. The tomatoes take a while to grow, so please don't click stop thinking it is over. It may be lagging a bit, there was a lot of scripts so...
Um.. I got this idea from the licky cat contest (which I'm sure many of you are familiar with) believe it of not. I thought it would be cool to make the sunset by doing the same thing the creator of the licky cat creator did. :)
