You drag and drop a physical representation of your chip onto the System Panel. Then, you add your components (a switch, an LED, a potentiometer) virtually.
In Flowcode v8:
At its core, Flowcode is a for embedded systems. Instead of typing lines of C or C++ code, users drag and drop "icons" (loops, inputs, decisions, outputs) onto a flowchart. Behind the scenes, Flowcode v8 compiles this flowchart into highly optimized C code, which is then sent to a compiler (like XC8, GCC, or Arduino’s AVR-GCC) to generate a HEX file for your microcontroller. flowcode v8