[TRAFFIC_LIGHTS] add Traffic Lights ASM source code
[THUNDERBOLT_LIGHTS] add Thunderbolt Lights ASM source code
[HW2_TRAFFIC_LIGHTS] Flash the Green Lights before trun to Yellow
[HW3_THUNDERBOLT_LIGHTS] use 16 LED to implement Thunderbolt Lights

1. change the delay to 0.025sec
2. change to use 8051 Timer 1
3. change to 16 LED Thunderbolt Lights