Clicking this button will download your program to the virtual brick. First, click the button on the bottom right corner of the LEGO EV3 Programming environment. If you prefer a more realistic programming experience and want to use the EV3 Virtual Brick to run your program, this option may be for you. Clicking this button will automatically download and run the program in the simulated environment, it will just take a couple of seconds to work! Once you have created a program and are ready to try it out, click the button on the bottom right corner of the LEGO EV3 Programming environment. There are four ways to download and run your program in the simulation environment.