It is required to use an Codey Rocky device. If you do not have Codey Rocky, you can buy this device. Firstly, go to source code. Because you can only connect a device on source code. Selecting live mode is required to play this project. mBlock 5.5.1 or below: Click the 'Connect' button. But make sure you need to download mLink first. mBlock 5.5.1 or above Click the 'Connect' button. But make sure you need to download mLink first. (If mLink was selected) If you refuse to download mLink or slow connections, Click the serial button or bluetooth and select this device and connect it (If direct connection was selected) You may require a bluetooth dongle if your device does not support bluetooth. If you do not want to let Codey Rocky to fall into hazardous things, just take out Codey or place the Codey Rocky on the floor for your safety. Here is the list if you put numbers: 1 = Scissors 2 = Paper 3 = Stone Place the answer ONLY 'scissors', 'paper', 'stone' or '1', '2', and '3'. If you choose neither of these list, they won't continue. Enjoy the project!