simplefly

local modules = peripheral.wrap "back"

os.loadAPI "metaowner.lua"
metaowner.upgrade(modules)

while true do
    local meta = modules.getMetaOwner()

    while meta.isSneaking or meta.isFlying do
        meta = modules.getMetaOwner()
        modules.launch(meta.yaw, meta.pitch, 4)
        sleep(0.1)
    end

    if meta.motionY < -0.8 then
        modules.launch(0, 270, 2)
    end

    sleep(0.4)
end