Tank Monitor

Tank = peripheral.wrap("back")
--local m = peripheral.wrap("top")
--term.redirect(m)
Color1 = colors.white
Color2 = colors.red
Title = "Lava Tank"
Data = {}
Width = 5
Height = 10
x,y = term.getSize()
term.clear()
if Width > x then
    print("Error : Width too large ")
    os.shutdown()
elseif Height >   y then
    print("Error : Height too hight ")
end

function Middle(SizeMax,Size)
    return(math.floor((SizeMax/2)-(Size/2)))
end

function FillData()
    for k,v in pairs(Tank.getTanks("back")[1]) do
        peripheral.call("top","write",k)
        peripheral.call("top","write",v)
        peripheral.call("top","write","\n")
        Data[k] = v
    end
end

function getCord(Cord)
    Xpos,Ypos = term.getCursorPos()
    if Cord == "x" then
        return Xpos
    else
        return Ypos
    end
end
function Initialisation()
    term.setCursorPos(Middle(x,Width),Middle(y,Height))
    paintutils.drawLine(getCord("x"),getCord("y"),getCord("x"),getCord("y")+Height,Color1)
    paintutils.drawLine(getCord("x"),getCord("y"),getCord("x")+Width,getCord("y"),Color1)
    paintutils.drawLine(getCord("x")+Width,getCord("y")+Height,getCord("x"),getCord("y")+Height,Color1)
    paintutils.drawLine(getCord("x")+Width,getCord("y")+Height,getCord("x"),getCord("y")+Width,Color1)
end

while true do
    term.clear()
    Initialisation()
    FillData()
    term.setCursorPos(getCord("x")+1,getCord("y"))
    for i = 1,(Data["amount"]/Data["capacity"])*Width do
        paintutils.drawLine(getCord("x"),getCord("y")+i,getCord("x")+Width-2,getCord("y")+i,Color2)
    end
    term.setCursorPos(Middle(x,2*#Title),Middle(y,term.getCursorPos()[2]))
    term.write(Title)
    term.setCursorPos(getCord("x"),getCord("y")+5)
    term.write(math.floor(Data["amount"]/Data["capacity"]*100).." %")
    sleep(5)
end