function refuel()
  turtle.select(1)
  turtle.refuel(2)
end

function digForward()
  while turtle.detect() do
    turtle.dig
  end
end

function layer()
  digForward()
  turtle.forward()
  turtle.digDown()
  turtle.turnLeft()
  digForward()
  tutrle.forward()
  turtle.digDown()
  turtle.turnRight()
  turtle.turnRight()
  light()
  turtle.turnRight()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
end

   -- this is the function i need help with, i looked up what i could but it doesnt work and i tried   variations

function light()
  for i = 1, times do
    if 1%9==0 and torch ~= "n" then
      turtle.select(2)
      turtle.placeDown()
      turtle.select(1)
    end
  end
end

term.write("Please enter how many layers: ")
times = read()
for i = 1, times do
  layer()
end