File content as of revision 0:c8547914b033:

#include "mbed.h"
#include "rtos.h"

DigitalOut led1(p17);
DigitalOut led2(p18);
DigitalOut led3(p19);
DigitalOut led4(p20);
DigitalOut led5(p27);
DigitalOut led6(p28);
DigitalOut led7(p29);
DigitalOut led8(p30);

void led1_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x1);
        led1 = !led1;
    }
}

void led2_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x1);
        led2 = !led2;
    }
}

void led3_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x1);
        led3 = !led3;
    }
}

void led4_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x1);
        led4 = !led4;
    }
}

void led5_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x2);
        led5 = !led5;
    }
}

void led6_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x2);
        led6 = !led6;
    }
}

void led7_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x2);
        led7 = !led7;
    }
}

void led8_thread(void const *arg){
    while(1){
        Thread::signal_wait(0x2);
        led8 = !led8;
    }
}

int main(){
    Thread thread1(led1_thread);
    Thread thread2(led2_thread);
    Thread thread3(led3_thread);
    Thread thread4(led4_thread);
    Thread thread5(led5_thread);
    Thread thread6(led6_thread);
    Thread thread7(led7_thread);
    Thread thread8(led8_thread);
    
    while(1){
        thread1.signal_set(0x1);
        ThisThread::sleep_for(10);
        thread2.signal_set(0x1);
        ThisThread::sleep_for(10);
        thread3.signal_set(0x1);
        ThisThread::sleep_for(10);
        thread4.signal_set(0x1);
        ThisThread::sleep_for(10);
        thread5.signal_set(0x2);
        ThisThread::sleep_for(10);
        thread6.signal_set(0x2);
        ThisThread::sleep_for(10);
        thread7.signal_set(0x2);
        ThisThread::sleep_for(10);
        thread8.signal_set(0x2);
        ThisThread::sleep_for(10);
    }
}