int x[10];  // global to all tasks
int* y = &x; // pointer to global variable

task main()
{
  int i;  // task local
  int j;  // ditto

  for(i=0;i<5; i++)
  {
    *y = i+1; // indirect global variable access
    y++;
    for(j=0;j<4; j++)
    {
      PlayTone(x[i]*100+j*10, 50); // arrays & temporary variables
      Wait(100);
    }
  }
}