To deliver more damage, replace the following four lines:
plus.damage(bot-1, 0, 15, (15,3.8,15))
plus.damage(bot-1, 0, 15, (-15,3.8,15))
plus.damage(bot-1, 0, 15, (15,3.8,-15))
plus.damage(bot-1, 0, 15, (-15,0,-15))
to something like:
plus.damage(bot-1, 0, 60, (15,3.8,15))
plus.damage(bot-1, 0, 60, (-15,3.8,15))
plus.damage(bot-1, 0, 60, (15,3.8,-15))
plus.damage(bot-1, 0, 60, (-15,0,-15))
If you want to eliminate bots, replace the four lines with:
plus.eliminatePlayer(bot-1)
plus.eliminatePlayer(bot-1)
plus.eliminatePlayer(bot-1)
plus.eliminatePlayer(bot-1)