check

if redstone.getInput("right") == true then
  if turtle.getItemCount(1) == 1 then
     turtle.place()
     print("Yes")
     sleep(1)
     shell.run("startup")
  elseif turtle.getItemCount(1) ~= 1 then
     print("No!")
     sleep(1)
     shell.run("startup")
  end
shell.run("startup")
end