Convert received bluetooth daa into anything else

Hi everyone! Im currently making an app to “control” a robot by bluetooth.
The thing is, i know how to send information to the arduino, and know how to receive data of sensors that the arduino sends through the HC-06. But my question is, is there a way to take that data that the hc06 sends me and convert it in to something else?
for example: if the arduino sends me a “1” how can i detect it and make an image appear when it arrives?