if(timer){  //Check for Bomb Drop

    randAlien = rand() %10; //Pick the starting alien out of 10

    int i = 0;
    while(i<10){    //Cycle through all aliens if the first fails

        testAlien = randAlien + i % 10; //Ensure cycle loops back after 10

        if(alien[testAlien] != dead && alien[testAlien] != lastBomb){   //Check to see if we have the right alien
            int j = 0;
            while(j < 4) {  //Cycle through all bomb slots
                if(bomb[j] != visible){ //Check to see if this bomb can be dropped
                    dropBomb(bomb[j]);  //Drop bomb
                    j = 4;
                }
                j++;
            }
            i = 10; //Stop checking aliens once one succeeds
        }
        i++;
    }
}