Generate the outline of an island from a seed
BBC basic
Here's a very simple algorithm, which could be refined for more realism. If there are further changes in the rules I'm willing to change / delete.
take the 6 character string and add }@ to ensure asymmetry (this particular choice of characters gives islands that vaguely resemble Antarctica)
draw a line that connects 8 points at 45 degree intervals, with distance from the centre determined by the ASCII code.
  INPUT a$
  a$=a$+&quot;}@&quot;
  MOVE 364,300
  FOR i=1 TO 8
    r=4*ASC(MID$(a$,i))-192
    DRAW 300+r*COS(i*PI/4),300+r*SIN(i*PI/4)
  NEXT