Brick breaker

local Bricks = {{1,1,colors.orange}, {2,1,colors.orange}, {3,1,colors.orange}, {4,1,colors.orange}}
local MaxX,MaxY = term.getSize()
local x,y = 10, 10
local pX,pY = 20, MaxY-3
local sx,sy = 1,-1

function Draw()
    term.setBackgroundColour(colors.black)
    term.clear()

    --Bricks
    for i,u in pairs(Bricks) do
        paintutils.drawPixel(u[1], u[2], u[3])
    end

    --Ball
    paintutils.drawPixel(x, y, colors.white)

    --Player bar
    paintutils.drawLine(pX,pY, pX+4,pY, colors.blue)
end

function Physics()
    x = x+sx
    y = y+sy

    -- Check brick colision
    local counter = 1
    for i,u in pairs(Bricks) do
        --print(x .. "," .. y .. "," .. u[1] .. "," .. u[2])
        if (x==u[1] and y==u[2]) then
            table.remove(Bricks, counter)
            sx=sx*-1
            sy=sy*-1
            break
        end
        counter = counter+1
    end

    --check ball-player collision
    if (pY == y and (pX <= x and (pX+4)>= x)) then
        y = pX-2
        sx=sx*-1
        sy=sy*-1
    end

    --X Boundries
    if (x < 1) then
        x=2
        sx=sx*-1
    elseif (x > MaxX) then
        x=MaxX-1
        sx=sx*-1
    end

    --Y Boundries
    if (y < 1) then
        y=2
        sy=sy*-1
    elseif (y > MaxY) then
        -- Loose live
        y=MaxY-1
        sy=sy*-1
    end
end

while (true) do
    parallel.waitForAny(function()
        Physics()
        Draw()
        sleep(0.2)
    end,
    function()
        local event, key = os.pullEvent("key")
        if (key == keys.left) then
            pX = pX-1
        elseif (key == keys.right) then
            pX = pX+1
        end
    end)
end