File content as of revision 3:a1263051d681:

#include "mbed.h"
DigitalOut trafficYellowlight(p5);  //Yellow light pin declaration 
DigitalIn pedestrainButton(p8);  //Switch button pin declaration 
int main() {
    trafficYellowlight=1;  //Initialize Yellow light to ON
    while(1) 
    {
        
        if(pedestrainButton & trafficYellowlight){
            int counter=0;  // declaration and initialization of counter
            while(counter<10){
            counter+=1;
            trafficYellowlight=!trafficYellowlight;  //Blinking Yellow light for 10 second
            wait_ms(500);  //delay of 5 second
            }
            trafficYellowlight=0;  //switch off yellow light
             }
             if(!trafficYellowlight){
                 trafficYellowlight=!pedestrainButton;  // Yellow light reamin switched OFF but once button is pressed to be OFF Yellow light will be ON
             }
        
             wait_ms(500);
               }
}