thisone

x1,y1 = term.getSize() --Returns the size of your terminal
local char = "^" --makes charachter face up
local currentX = 25 --Saves the current X of the cursor
local currentY = 15 --Saves the current Y of the cursor
local running = true
score = 0 --holds the score value
hit = false --becomes true if bullet interacts with target
plus1 = "+1"
--this function draws the cursor to the screen
function drawCursor(x,y)
  x = currentX
  y = currentY

  term.setCursorPos(currentX, currentY)  --Draws a cursor at the current X/Y
  write(char)
 end

--this is the main gameloop
function gameLoop()

--these variables generate a randome nomber to set as the coordinates
--for the target boxes
alienRandX = math.random(50)
alienRandY = math.random(10)

--this function generates the bullet
function fireShell()
  fire = true

  --makes a new variable so the value doesnt change
  xshell = currentX
  yshell = currentY

  while fire == true do
    sleep(0.05)--regulates the speed
    yshell = yshell - 1
    --draws a box and fills in the one behind it
    paintutils.drawFilledBox(xshell, yshell-1, xshell, yshell-1, 2)
    paintutils.drawFilledBox(xshell, yshell, xshell, yshell, 32768)


    check_x_1 = xshell <= alienRandX + 1
    check_x_2 = xshell >= alienRandX
    --check_x_1 and check_x_2 check if the bullet is in beetween ether ends of the target
    check_y_1 = yshell <= alienRandY
    --check_y_1 checks if bullet is above bottom of target


    -- if all variables are true then hit = true
    if check_x_1 == true and check_x_2 == true and check_y_1 == true then
      hit = true
      score = score + 1 --adds one to score
    end

    --if the bullet pases the top of the screen it will stop
    if yshell < 0 then
      fire = false
     end

    --if bullet hits then fire stops
    if hit == true then
      fire = false
    end

  end
end

while running == true do

 --this clears the screen
  paintutils.drawFilledBox(0, 0, x1,y1, (32768))

   --this writes the score
   write("Score:")
   write(score)
   --draws cursor
   drawCursor(currentX, currentY)
   --draws target
   paintutils.drawFilledBox(alienRandX, alienRandY, alienRandX +1, alienRandY, (2))
  --makes plus1 nothing so once hit if statement finishes it goes back to nothing
    plus1 = " "
  ----------------------------------
  --returns value of event and key pressed
  local event,key = os.pullEvent( "key" )

         --keys 'a' or left arrow
   if key == 203 or key == 30 then --left
                sleep(0.01)
                currentX = currentX -2
         --keys 'b' or right arrow
   elseif key == 205 or key == 32 then --right
                sleep(0.01)
                currentX = currentX +2
         --key spacebar
   elseif key == 57 then
   --fires bullet if spacebar is pressed
     fireShell()


    end

   --spawns a new target once hit == true
     if hit == true then
       alienRandX = math.random(50)
       alienRandY = math.random(10)
       --sets plus1 to +1!
       plus1 = "+1!"
       write(plus1)
       --sleeps for .5 sec to let player see +1
       sleep(0.5)
       hit = false
     end

end
end
--runs gameloop
gameLoop()