10 print "C=" 

20 goto 10

Run

We have the winner!!!!

A little bit of fun with "c=" :)

1 pi=3.14159265359:r=6

10 for i=0to360step16

20 x=20-(sin(i*pi/180)*r):?spc(x)"c="

30 next:r=r+((r<19)*-1)

80 goto 10