Doubt on hardware

I have a doubt that my board was mall functioned its not showing the output for controlling devices code that has given by bolt only.

Hi there!. Could you please elucidate your issue. To check if the board works fine, see the led on the board. If the board is properly powered up and connected to the cloud, you can see two led glowing steadily. Also keep in mind that you may have to reload the webpage to obtain the output. You may have to switch to Chrome if the issue persist.