テキストエリアを書き換えて実行すると絵が変化します

<APPLET CODE="GDView0.class" WIDTH=560 HEIGHT=560> <param name=command0 value="read hajime"> <param name=hajime value=" set O 0 0; color 255 255 255;fcircle O 20; set A -1.25 0;set B 1.25 0;move OAB 0 1; copy BOO CXY;kaiten OC 75; kaiten BX 90;kaiten CY 90; set E line_line BX CY; copy B X;kaiten AX 90;set G line_line AX EC; set H naibun CO 4 -3; copy AB XY;move XY C; set K en_line EB XY 0;set L en_line GA YX 0;; color 0 0 0;circle OA;line ABEGA; color 0 0 255;circle GC;circle EC;line CH KL; color 255 156 0;gaisetuen CAH;gaisetuen CBH; skigou ABE ABE;kigou AG G OK K OL L GO O OH H BC C; color 255 0 0;point ABECOHG; "> </APPLET>