-- I create an array for ALL arrays
    arrayObject = {}
    -- Then I create the array for the player, enemies and bullets
    players = {}
    enemies = {}
    bullets = {}
    -- And put the arrays in arrayObject
    table.insert(arrayObject,players)
    table.insert(arrayObject,enemies)
    table.insert(arrayObject,bullets)
    -- I create a player, and 3 enemies
    Player = player(500,100)
    table.insert(players,Player)
    Enemy = enemy(-300,394,1)
    table.insert(enemies,Enemy)
    Enemy = enemy(-500,394,1)
    table.insert(enemies,Enemy)
    Enemy = enemy(-700,394,1)
    table.insert(enemies,Enemy)

-- I go through all arrays, minus the last one, loop 1.
for i=1,#arrayObject-1,1 do
        -- Here I check loop 1 + the remaining arrays, loop 2
        for j=i+1,#arrayObject,1 do
            -- Next I loop through the content of the array of loop 1
            for k=1,#arrayObject[i],1 do
                -- And here I loop through the content of the array of loop 2
                for m=1,#arrayObject[j],1 do
                    local obj1 = arrayObject[i][k]
                    local obj2 = arrayObject[j][m]
                    -- I check the collision
                    if (checkCollision(obj1,obj2)) then
                        obj1:collision(obj2)
                        obj2:collision(obj1)
                    end
                end
            end
        end
    end