4STROKE 8y@:$n=158::i=(*7) -i;"*HIGH SOFT* ";:5:n:100d: +236099\,25:23658j\,8 3O=12:2:6:(*7) T60<,27:1;123{,122z,579^3*:O:100d: LY=141):1;1;"**S C I E N C E**";:Y:100d: E2;3,4;"4 S T R O K E E N G I N E":100d: 1;3,4;"THE 4-STROKE ENGINE IS OFTEN CONSIDERED TO BE SUPERIOR TO THE 2-STROKE.IT DOES NOT REQUIRE A PETROIL MIXTURE & IS MORE FUEL-EFFICIENT. IN THE PROGRAM,LOOK CLOSELY AT THE FLOW OF PETROL()& OF EXHAUST(*). OBSERVE HOW THE ROCKER VALVES ()OPEN DURING THE INDUCTION & EXHAUST STROKES,& HOW THEY STAY CLOSED DURING THE COMPRESSION & IGNITION STROKES.":750: P1:6:2: Zbn=031:0,n;" ";1,n;" ";20,n;" ";21,n;" ":.2~L,n:n dcn=219:n,0;" ";n,1;" ";n,31;" ";n,30;" ":.2~L,-n:n x~1;7;7,14;3;"FOUR";9 ,13 ;1;"STROKE";11 ,13 ;4;"ENGINE" 1000 cylinder 3:7: 91;0,7;1;"FOUR-STROKE ENGINE" 96`,130 J10 ,0:0,-10 :-3,0:0,-84T 96`,134 [14,0:0,-14:28,0:0,14:14,0 152,130 J-10 ,0:0,-10 :2,0:0,-84T "A1;6,15;"";7,15;"":800  %H21,0;1;6;"********PRESS P TO PAUSE********" ' induction 37,17;0;"";7;1;9 ,1;"Induction";5,10 ;2;7;"";5,19;" " 6n=9 15 @q1;7;n-1,13 ;" ";n,13 ;6;"";n+1,13 ;6;"" E 19 G="P"700 Jn  compression q7,13 ;0;"";9 ,1;7;1;"Compression";5,10 ;7;" " n=159 -1 q1;n+2,13 ;7;" ";n,13 ;6;"";n+1,13 ;6;""  19 ="P"700 n  ignition 29 ,1;7;1;"Ignition " )n=9 15:q=10 15 !l8,15;1;2;"":x=14:0.01z# =,10 :0.01z# =,20:x:q &1;n-1,13 ;7;" ";n,13 ;6;"";n+1,13 ;6;"":1:2;n-1,13 ;"*****" 0 19 5="P"700 :n X exhaust v7;7,17;" ";8,15;" ";9 ,1;7;1;"Exhaust ";5,19;2;7;"*" n=159 -1 q1;n+2,13 ;7;" ";n,13 ;6;"";n+1,13 ;6;""  19 ="P"700 n  7,13 ;0;" "  300, pause G21,0;1;6;"*PRESS C TO CONTINUE;S TO STOP*"  0 Q="C"21,0;1;6;"********PRESS P TO PAUSE********": P="S"21,0;2;7;"************GOODBYE************":  710  labelling 43,13 ;"Spark" >:4,1;0;"Inlet Plug Exhaust" H5,1;"Manifold" R5,22;"Manifold" \9 ,19;"Cylinder" f19,13 ;"Piston" z  UDG storage a$="abcdefghijkl"  n=0  n=n+1 n>12  b$=a$(n) B c(8) Lm=07 Q p=m+1 Vc(p) X b$+m,c(p) `m j 1030 ܁11111111,10000000,11111111,10000000,11111111,10000000,10000000,10000000 11111111,00000000,11111111,00000000,11111111,00000000,00000000,00000000 11111111,00000001,11111111,00000001,11111111,00000001,00000001,00000001 10000000,10000000,10000000,11000000,11100000,10110000,10011000,11111111 00000000,00000000,00000000,00000000,00000000,00000000,00000000,11111111 00000001,00000001,00000001,00000011,00000111,00001101 ,00011001,11111111 00010000,00010000,001110008,001110008,001110008,01111100|,01111100|,11111111 "001110008,001110008,001110008,00101000(,00101000(,00100000 ,001110008,00000000 ,10000000,11001000,01101100l,001101106,00001011 ,00000001,00000000,00000000 600011000,001100000,01111111,11111111,01111111,001100000,00011000,00000000 @00011000,001100 ,11111110,11111111,11111110,00001100 ,00011000,00000000 J00111100<,00111100<,00000000,00000000,00000000,00000000,00000000,00000000 i*)A abcdefghijklLpBl+<<!