A_count=5
A_interval=300
B_count=3
B_interval=60

acnt=0
while :
do
   acnt=`expr $acnt + 1` 
   echo "Run process A  $acnt/$A_count"

   bcnt=0
   while :
   do
      bcnt=`expr $bcnt + 1`
      echo "Run process B $bcnt/B_count"
      if [ $bcnt -lt $B_count" ]
         sleep $B_interval
      else
         break
      fi
   done

   if [ $acnt -lt A_count ]
      sleep $A_interval
   else
      break
   fi
done