Space shooter

local w,a,s,d,space = false,false,false,false,false
local x,y = 26,17
local cooldown = 10

function Paint()
    term.setBackgroundColor(colors.black)
    term.clear()

    -- Player
    paintutils.drawPixel(x,y,colors.green)
    paintutils.drawLine(x-1,y+1,x+1,y+1,colors.green)

    -- Enemies
end

function Movement()
    if (w==true) then y=y-1 end
    if (a==true) then x=x-1 end
    if (s==true) then y=y+1 end
    if (d==true) then x=x+1 end

    --Shooting ¿How tho...?
    cooldown=cooldown-1
    if (space==true and cooldown<=0) then
        print("Pew Pew Im a bullet >:)")
        cooldown=10
    end

    --Correction
    if (x>=50) then x=49 end
    if (x<=2) then x=3 end
    if (y>=18) then y=17 end
    if (y<=1) then y=2 end
end

-- Main --
while(true) do
    parallel.waitForAny(function()
            Movement()
            Paint()
            sleep(0.2)
        end,
        function()
            local e,k = os.pullEvent("key")
            if (k == keys.space) then space=true
            elseif (k == keys.w) then w=true
            elseif (k == keys.a) then a=true
            elseif (k == keys.s) then s=true
            elseif (k == keys.d) then d=true
            end
        end,
        function()
            local e,k = os.pullEvent("key_up")
            if (k == keys.space) then space=false
            elseif (k == keys.w) then w=false
            elseif (k == keys.a) then a=false
            elseif (k == keys.s) then s=false
            elseif (k == keys.d) then d=false
            end
        end
    )
end