Arduino MEGA 2560 R3 User Manual page 3

4. Start
Figure 3 shows a picture of the start state. After pressing PB0 to start the program, the LED
lights is going to flash. When it flashes three times, then you can start to input the location of the
accident.
5. Input State
Figure 4 shows a picture of Input State, which is a state waiting for the user to input.
Figure 2: Initial State
Figure 3: Start