File content as of revision 3:2ffb7f153526:

#include "mbed.h"

DigitalOut Out1(D13);
DigitalOut Out2(D12);
DigitalOut Out3(D11);
DigitalOut Out4(D10);
DigitalOut Out5(D9);
DigitalOut Out6(D8);
DigitalOut Out7(D7);
DigitalOut Out8(D6);

DigitalIn In1(D0);

Serial pc(SERIAL_TX, SERIAL_RX);

int main() 
    {
        uint8_t menu_0=0;
        uint8_t menu_1=0;
        uint8_t select_0=0;
        uint8_t select_1=0;  
        
        pc.printf("Hello Sir !!\n");
        while(1)
        {
            if(menu_0 == 0)
            {
                pc.printf("Plese select your menu\n");
                pc.printf("Input 1 for Menu1\n");
                pc.printf("Input 2 for Menu2\n");
                menu_0 = 1;
            }
            if(pc.readable())
            {
                select_0 = pc.getc();
                pc.printf("\n");
                menu_0 = 0;
                switch(select_0)
                {
                    case('1'):
                        while(1)
                        {
                            if(menu_1==0)
                            {
                                pc.printf("Input 1 for Pattern1\n");
                                pc.printf("Input 2 for Pattern2\n");
                                pc.printf("Input 3 for Exit");
                                menu_1 = 1;
                            }
                            if(pc.readable())
                            {
                                select_1 = pc.getc();
                                pc.printf("\n");
                                menu_1 = 0;
                                switch(select_1)
                                {
                                    case('1'): pc.printf("Pattern1\n"); break;
                                    
                                    case('2'): pc.printf("Pattern2\n");break;
                                    
                                    case('3'): break;
                                }
                            }
                        }
                    case('2'):
                        pc.printf("Read Status\n");
                        break;
                }
            }
        }
    }