function love.update(dt)

        if ball:collides(player1) then -- collides() is stored in Ball.lua
                -- deflect the ball to the right
                -- change velocity from -100, to 100
                ball.dx = -ball.dx
        end

        if ball:collides(player2) then
                -- deflect ball to the left
                ball.dx = -ball.dx
        end

        if ball.y <= 0 then -- the top of the screen
                --deflect the ball down
                ball.dy = -ball.dy
                -- reset the ball in the case of it hitting the top of the screen
                ball.y = 0
        end

        if ball.y >= VIRTUAL_HEIGHT - 4 then -- the ball is 4 pixels tall so offset collision by 4 pixels
                ball.dy = -ball.dy
                ball.y = VIRTUAL_HEIGHT - 4
        end



         --[[
                 if we reach the left or right edge of the screen
                 go back to start and update the score
         ]]
        if ball.x < 0 then
                player2Score = player2Score + 1
                serveringPlayer = 1
                ball:reset() -- randomizes the balls dx. we want to set that based on who scored
                if player2Score >= 3 then
                        gameState = 'victory'
                        winningPlayer = 2
                else
                        gameState = 'serve'
                end

        end

        if ball.x > VIRTUAL_WIDTH then
                player1Score = player1Score + 1 -- serving player not working... always says serving player 2
                servingPlayer = 2
                ball:reset()
                --ball.dx = -100
                --gameState = 'serve'
                if player1Score >= 3 then
                        gameState = 'victory'
                        winningPlayer = 1
                else
                        gameState = 'serve'
                end
        end

        -- player 1 movement
        if love.keyboard.isDown('w') then
                player1.dy = -PADDLE_SPEED -- negative is up
        elseif love.keyboard.isDown('s') then
                player1.dy = PADDLE_SPEED -- replaces math.min(VIRTUAL_HEIGHT - 2-,PLAYER1Y + PADDLE_SPEED * dt)
        else
                player1.dy = 0 -- if neither is true, the paddle speed is 0
        end
        -- player 2 movement
        if love.keyboard.isDown('up') then
                player2.dy = -PADDLE_SPEED
        elseif love.keyboard.isDown('down') then
                player2.dy = PADDLE_SPEED
        end
        else
                player2.dy = 0
        end
        if gameState == 'play' then
                ball:update(dt)
                --ballX = ballX + ballDX * dt   these will instead be done with update
                --ballY = ballY + ballDY * dt
        end

        player1:update(dt) -- replaces player1Y = math.min(VIRTUAL_HEIGHT - 20, player1Y + PADDLE_SPEED * dt)... now stored in the paddle class and replace player1Y with self.y
        player2:update(dt)
        ball:render()
end