alltheforge10_client_tree

rednet.open("top")
rednet.host("energy", "tree")
local cube = peripheral.wrap("right")

while true do
    local sender, message, distance = rednet.receive("energy")
    if message == "energyUpdate" then
        rednet.send(sender, cube.getEnergyFilledPercentage()*10, "energy")
    end
end