一硝:(HHV(HIGH,9)+LLV(LOW,9))/2,colormagenta,LINETHICK2;二黄:(HHV(HIGH,26)+LLV(LOW,26))/2,coloryellow,LINETHICK2;硝酸钾:=MA(C,3);硫磺:=MA(硝酸钾,5);木炭:=MA(硝酸钾,60);三木炭:=3*木炭-2*硫磺;AA:=OSS(二黄,三木炭);BB:=CROSS(一硝,二黄);DRAWTEXT(BB,二黄,'火'),colorred;DRAWTEXT(AA,二黄,'黑火药'),colorgreen;