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 B -3 -3;set A -3 3;copy AB CD; kaiten BC -90;kaiten AD 90;set I naibun BC 1 1; set X naibun DI 1 1;set F en_en XD IB 1; set E naibun AD 2 1; set H line_line EC DI; color 255 255 0;fline AFH; color 0 0 0;circle IB; line ABCDAHF IDFCE BFA; color 255 0 0;point ABCDEFIH; skigou ABCD ABCD;kigou CF F OE E OH H OI I; "> </APPLET>