Interrupts, Clock Generation, Resets, and Operation Modes - The HCS12/9S12: An Introduction to Software and Hardware Interfacing - page 301

12. Turn LEDs driven by pins RB2 and RB5 on and off four times. The on-time and off-time
are each about 0.4 s.
13. Turn LEDs driven by pins RB1 and RB6 on and off four times. The on-time and off-time
are each about 0.4 s.
14. Turn LEDs driven by pins RB0 and RB7 on and off four times. The on-time and off-time
are each about 0.4 s.
15. Go to step 1 and repeat.
You are required to use the RTI to generate the required delay and trigger the change of LED
patterns.