local robot = require("robot")
local moving = true
local invPos = 1

function verifyInv()
   if(robot.count(invPos) == 0) then
      invPos = invPos + 1
      if(invPos > (robot.inventorySize() - 1) or robot.count(invPos) == 0) then
         return false
      end
      robot.select(invPos)
   end

   return true
end

function replaceBlock()
   local check = verifyInv()

   if(check) then
      robot.swingUp()
      robot.placeUp()
   end

   return check
end

while moving do
   for move=1,93 do
      moving = robot.forward()
      if(not moving) then
         break
      end
   end

   if(not moving) then
      break
   end

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnLeft()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnRight()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnLeft()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnRight()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnLeft()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.forward()
   robot.turnRight()
   robot.forward()

   if(not replaceBlock()) then
      break
   end

   robot.turnRight()

   for move=1,6 do
      moving = robot.forward()
      if(not moving) then
         break
      end
   end

   if(not moving) then
      break
   end

   robot.turnLeft()
end