ballbounce

term.redirect(peripheral.wrap("top"))
term.setBackgroundColor(colors.black)
term.clear()
local w,h = term.getSize()
local score1 = 0
local score2 = 0
local ballx = w/2
local bally = h/2
local ballvx = -1
local ballvy = 1

function draw()
  term.setBackgroundColor(colors.black)
  term.clear()
  term.setBackgroundColor(colors.green)
  term.setCursorPos(ballx, bally)
  term.write(" ")
  term.setTextColor(colors.green)
  term.setBackgroundColor(colors.black)
  term.setCursorPos(2, 1)
  term.write(score1)
  term.setCursorPos(w-1, 1)
  term.write(score2)
end




function moveball()
  while true do
    sleep(0.1)
    ballx = ballx + ballvx
    bally = bally + ballvy
    if bally > h-1 then
      ballvy = -ballvy
    end
    if bally < 1 then

      ballvy = -ballvy
    end
    if ballx > 2 and ballx < 3 then
      ballvx = -ballvx
    end
    if ballx > w-1 and ballx < w then
      ballvx = -ballvx
    end
    if ballx > w then
      score1 = score1+1
      ballx = w/2
      bally = h/2
      ballvx = -1
      ballvy = 1
    end
    if ballx < 1 then
      score2 = score2+1
      ballx = w/2
      bally = h/2
      ballvx = 1
      ballvy = 1
    end
    draw()
  end
end
moveball()