Bubble sort is a sorting algo that repeatedly steps through the list to be sorted, compares each pair of adjacent items and swaps them if they are in the wrong order.

It is a popular, but inefficient sorting algo, it has worst-case and average complexity both О(n2), where n is the number of items being sorted.

Here is an implementation in python

   count = len(B)
   for i in xrange(count): 
       for j in xrange(count-1,i,-1): 
           #print "compairing %i with %i"%(B[j],B[j-1])
           if B[j] < B[j - 1]:
               temp = B[j]
               B[j] = B[j - 1]
               B[j - 1] = temp
               #print "Swapping  %i with %i"%(B[j],B[j-1])
       #print "Transformed Array: " , B
           

B = [6,5,3,1,8,7,2,4]
print "Unsorted: ", B 
bubbleSort(B)
print "Bubble Sorted: ", B 



Hope this helps