follow

local mods = peripheral.wrap "back"
local targ = ...

local function yaw_and_pitch(e)
    local x, y, z = e.x, e.y, e.z
    local pitch = -math.atan2(y, math.sqrt(x * x + z * z))
    local yaw = math.atan2(-x, z)
    return math.deg(yaw), math.deg(pitch)
end

while true do
    local t = mods.getMetaByName(targ)
    if t then
        local y, p = yaw_and_pitch(t)
        --mods.fire(y, p, 0.5)
        mods.launch(y, p, 1)
    end
    sleep(0.1)
end