My erroring blue and orange bone wave

 -- A blue and orange bone wave. this is the fist time i actually my own made a unitale/cyf wave. you can use it without credit! just i'd rather like credit. does not matter. i could never have made this if UTPlays did not have a tutorial for it!
spawntimer = 0
bullets = {}
sprite2 = "cyan2"
sprite3 = "orange2"
sprite4 = "orange3"
sprite5 = "orange4"
sprite6 = "orange5"
sprite7 = "orange6"

function Update()
 -- this is how we make the wave work in action!
spawntimer = spawntimer + 1
if spawntimer%40 == 0 then
    local number = math.random(1,2)
    local posx = 80
    local.posy = 0
    if number == 1 then
        local bullet = Createprojectile(sprite2, posx, posy)
        bullet.SetVar('type', "cyan2")
        bullet.SetVar('xspeed', 1.3)
        bullet.SetVar('yspeed', 0)
        table.insert(bullets, bullet)
    elesif number == 2 then
        local bullet = Createprojectile(sprite3, posx, posy)
        bullet.SetVar('type', "orange2")
        bullet.SetVar('xspeed', 1)
        bullet.SetVar('yspeed', 0)
        table.insert(bullets, bullet)
     end
end
    for i=1 #bullets do
    local bullet = bullets[1]
        local xdifference = Player.x - bullet.x
        local ydifference = Player.y - bullet.y
        local xpos = bullet.GetVar('xpos')
        local ypos = bullet.GetVar('ypos')
        local xspeed = bullet.GetVar('xspeed')
        local yspeed = bullet.GetVar('yspeed')
     end
end