Energy Storange Display 3x3

shell.run("clear")
mon = peripheral.wrap("back")
os.loadAPI("ocs/apis/sensor")
sen = sensor.wrap("top")
mon.clear()
sTime = 1
rs.setOutput("front",true)
gx,gy = mon.getSize()
function cbut(x,y,text,bcol,tcol)
if bcol == nil then
  bcol = colors.black
end
if tcol == nil then
  tcol = colors.white
end
  mon.setBackgroundColor(bcol)
  mon.setTextColor(tcol)
  mon.setCursorPos(x,y)
  mon.write(text)
  mon.setBackgroundColor(colors.black)
  mon.setTextColor(colors.white)

end
mon.setTextScale(0.5)
while true do
shell.run("clear")
tab = {}
n = 0
s = sen.getTargets()

for v, k in pairs(s) do
  if k.Name == "MFSU" then
    s1 = sen.getTargetDetails(v)
    tab[n] = {}
    tab[n]["Stored"] = s1.Stored
    tab[n]["Capacity"] = math.floor(s1.Capacity)
    tab[n]["Percent"] = math.floor(100 / s1.Capacity * s1.Stored,0)
    n = n +1

  end

end
  mon.clear()
  print(#tab .. " MFSU's loaded")
  cbut(1,1,"ID")
  cbut(10,1,"Stored")
  cbut(22,1,"Capacity")
  cbut(33,1,"Percent")

  g = 0
  a = 0
for i = 0 , #tab,1 do
  g = g + tab[i]["Capacity"]
  a = a + tab[i]["Stored"]

  if tab[i]["Percent"] == 100 then
    ttcol = colors.green
  elseif tab[i]["Percent"] < 100 and tab[i]["Percent"] > 50 then
    ttcol = colors.orange
  elseif tab[i]["Percent"] < 50 then
    ttcol = colors.red

  end
  cbut(1,i+3,string.format("%d",i+1),colors.black,ttcol)
  cbut(10,i+3,string.format("%d",tab[i]["Stored"]),colors.black,ttcol)
  cbut(20,i+3,"/", colors.black,ttcol)
  cbut(22,i+3,string.format("%d",tab[i]["Capacity"]),colors.black,ttcol)
  cbut(33,i+3,string.format("%d",tab[i]["Percent"]),colors.black,ttcol)

  if tab[i]["Percent"] < 100 then
  cbut(35,i+3,"  %",colors.black,ttcol)
  else


  cbut(36,i+3," %",colors.black,ttcol)
  end



end
i = 100 / g * a
cbut(1,gy-1,"Sum:")
cbut(10,gy-1,string.format("%d",a))
cbut(20,gy-1,"/")
cbut(22,gy-1,string.format("%d",g))
cbut(33,gy-1,string.format("%d",i))
if i < 100 then
  cbut(35,gy-1,"  %")
 else
  cbut(36,gy-1," %")
 end




if i > 90 and i <= 100 then
  rs.setOutput("front",false)
elseif i < 90 then
  rs.setOutput("front",true)
  end
sleep(sTime)
end