1 GOTO24
2 GETA$:IFA$=""THEN11
3 IFA$>"/"ANDA$<":"THENSF=VAL(A$)-SS*(A$="0"):GOTO11
4 IFA$="[147]"THENSYS36888:GOTO11
5 IFA$="!"THENSYS36867:GOTO11
6 IFA$="="THENSYS36882:GOTO11
7 IFA$="&"THENSYS36879:GOTO11
8 IFA$=""THENSYS36885:GOTO11
9 IFA$="_"THENA=USR(33),1:A=USR(33),2:A=USR(33),3:GOTO24
10 A=USR(33),0:LOAD"CMND",D0
11 X=X+USR(121)*SF:Y=Y-USR(122)*SF
12 IFX>331THENX=12
13 IFX<12THENX=331
14 IFY>239THENY=40
15 IFY<40THENY=239
16 A=USR(34),X,Y,0:A=USR(34),16,Y,6:A=USR(34),X,231,7:RETURN
17 GETA$:IFA$<>""THEN3
18 X=X+USR(121)-USR(122)*1/M::Y=Y-USR(122)+USR(121)*M
19 IFX>331THENX=331
20 IFX<12THENX=12
21 IFY>239THENY=239
22 IFY<40THENY=40
23 A=USR(34),X,Y,0:A=USR(34),16,Y,6:A=USR(34),X,231,7:RETURN
24 A=USR(32),0
25 GOSUB2:A=USR(117):IFA<>16THEN25
26 X1=X-12:Y1=Y-40:A=USR(34),X,Y,1:A=USR(32),1
27 A=USR(117):IFA<>0THEN27
28 GOSUB2:A=USR(117):IFA<>16THEN28
29 X2=X-12:Y2=Y-40:A=USR(34),X,Y,2:A=USR(32),2
30 A=USR(117):IFA<>0THEN30
31 IF(Y1=Y2)OR(X1=X2)THENA=USR(33),1:A=USR(33),2:GOTO24
32 M=(Y2-Y1)/(X2-X1)
33 GOSUB2:A=USR(117):IFA<>16THEN33
34 X3=X-12:Y3=Y-40:A=USR(34),X,Y,3:A=USR(32),3
35 A=USR(117):IFA<>0THEN35
36 GOSUB17:A=USR(117):IFA<>16THEN36
37 X4=X-12:Y4=Y-40
38 IF(X3<>X4)AND(Y3<>Y4)THEN42
39 FORT=1TO4:A=USR(33),T:NEXT
40 A=USR(117):IFA<>0THEN40
41 GOTO24
42 SYS36864
43 A=USR(117):IFA<>0THEN43
44 A=USR(33),3:A=USR(66),X3,Y3,X4,Y4
45 GOTO33