creepystare

local mods = peripheral.wrap "back"

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
    for _, e in pairs(mods.sense()) do
        if e.pitch ~= 0 and e.displayName == e.name then -- good heuristic for player detection
            local y, p = yaw_and_pitch(e)
            mods.look(y, p)
        end
    end
    sleep(0.1)
end