local lamps = {
[1] = peripheral.wrap("glowstone_illuminator_0"),
[2] = peripheral.wrap("glowstone_illuminator_1"),
[3] = peripheral.wrap("glowstone_illuminator_2"),
[4] = peripheral.wrap("glowstone_illuminator_3"),
[5] = peripheral.wrap("glowstone_illuminator_4"),
[6] = peripheral.wrap("glowstone_illuminator_5"),
[7] = peripheral.wrap("glowstone_illuminator_7"),
[8] = peripheral.wrap("glowstone_illuminator_8"),
[9] = peripheral.wrap("glowstone_illuminator_9"),
[10] = peripheral.wrap("glowstone_illuminator_10")
}
local tank = peripheral.wrap("back")
local tankinfo = tank.getTanks("unknown")
--print(textutils.serialize(tankinfo))

local percentage = 0
if tankinfo[1].amount ~= nil then
    percentage = tankinfo[1].amount / tankinfo[1].capacity * 100
end

for key,value in pairs(lamps) do
    value.setColor(0x000000)
end

while true do
    for i=1,10,1 do
        lamp = lamps[i]
        if (percentage > ((i - 1) * 10)) then
            lamp.setColor(0xFF0000)
        else
            lamp.setColor(0x000000)
        end
    end
    print(percentage)
    os.sleep(1)

    tankinfo = tank.getTanks("unknown")
    percentage = 0
    if tankinfo[1].amount ~= nil then
        percentage = tankinfo[1].amount / tankinfo[1].capacity * 100
    end
end