// Draw a spiral
START IN  
 TD=   0.075
FR XY  =0.20
GO Z- .1
REPEAT     4
ZERO AT
   X- 0.1
   Y  0.0
ARC
 XC= 0
 YC= 0
  a= 90
ZERO AT
   X 0
   Y -.1
ARC
 XC= 0
 YC= 0
  a= 90
ZERO AT
   X .1
   Y 0
ARC
 XC= 0
 YC = 0
  a = 90
ZERO AT
   X 0
   Y .1
ARC
 XC= 0
 YC= 0
  a= 90
REPEAT END
END