Battery thing

local screen = self.CreateLink("screen")
local bats = {}

for i = 1, 10 do
    bats[i] = self.CreateLink("battery" .. tostring(i))
end

function ProgressBar(x, y, w, perc)
    local extra = w * perc
    local fg = string.rep(" ", extra)
    local bg = string.rep(" ", w)

    screen.Draw(bg, x, y, Color(0, 0, 0, 0), Color(0, 0, 0, 127))
    screen.Draw(fg, x, y, Color(0, 0, 0, 0), Color(127, 127, 127))

    screen.Draw( tostring(math.Round(perc * 100 * 100) / 100) .. "%", x + w * 0.5 - 2, y)
end

function Think()
    if not screen.Connected then return 1 end
    screen.Clear(Color(0, 0, 0, 0))

    local y = 0
    local x = 1

    for k,v in pairs(bats) do
        if v.Connected then
            screen.Draw("Battery " .. tostring(k), x, y)
            print(v.Charge(), v.Capacity())
            ProgressBar(x, y + 1, 60, v.Charge() / v.Capacity())
            y = y + 3
        end
    end

    return 0.0001
end