,PIET
,PIET IS A PROGRAMM+ LANGUAGE ^: S\RCE
CODE IS N TEXT B A PICTURE 
SPECIFICALLY1 AN AB/RACT IMAGE ( COLOR$
BLOCKS T LOOKS1 BY DESIGN1 L A ,PIET
,MONDRIAN CANVAS4 ,DAVID ,MORGAN-,M>
CR1T$ X & "ND X AF ! ,DUT* GEOMETRIC
AB/RAC;NI/1 PRODUC+ ! ONLY LANGUAGE 9 ?
CATALOGUE ^: 8,HELLO1 ,_W60 Y CD
PLAUSIBLY HANG 9 A GALL]Y4.<CITE3
.<,PIET1 ESOT]IC-LANGUAGES WIKI 
,MORGAN-,M>1 ! ,MONDRIAN "NSAKE1 & !
COLOR-BLOCK EXECU;N MODEL.>.>
,A ,PIET PROGRAM IS AN IMAGE MADE (
CODELS  ! LANGUAGE'S EQUIVAL5T ( PIXELS1
: MAY 2 SCAL$ TO >BITR>Y SIZE = 4PLAY4
,3TIGU\S SAME-COLOR$ CODELS =M COLOR
BLOCKS1 & EXECU;N PROCE$S :5 A DIREC;N
PO9T] "<,,DP"> WALKS F BLOCK TO BLOCK
ACR ! CANVAS4 ,! COMM& EXECUT$ AT EA*
/EP IS DET]M9$ N BY ! COLOR 5T]$ B BY !
*ANGE 9 HUE & LI<T;S 2T ! BLOCK LEFT & !
BLOCK 5T]$  ! PROGRAM IS 5COD$ 9 !
TRANSI;NS1 : IS :Y A ,PIET IMAGE HAS NO
4C]NIBLE SYNTAX AT ALL3 ONLY
RELA;N%IPS4.<CITE3 .<,PIET EXECU;N MODEL
CODELS1 COLOR BLOCKS1 ! DIREC;N PO9T]1 &
! CODEL *OOS].>.>
,A PALETTE ) A PROGRAM 9SIDE
,PIET DEF9ES EXACTLY #BJ COLORS3 SIX
HUES "<R$1 YELL[1 GRE51 CYAN1 BLUE1
MAG5TA"> AT ?REE LI<T;S LEVELS  #AH
CYCLICALLY-ORD]$ COLORS  PLUS :ITE1 : !
PO9T] PASSES /RAI<T "? L BLANK SPACE1 &
BLACK1 : IS IMPASSABLE4 ,COMM&S COME F !
TWO CYCLES3
- ,HUE *ANGE "<#J#E /EPS =W>D >.D !
SIX-HUE R+"> SELECTS ! R[ ( ! COMM&
TABLE4 - ,LI<T;S *ANGE "<N"O1 "O1 OR TWO
/EPS AL;G ! LI<TD>K CYCLE"> SELECTS !
COLUMN4 - ,CROSS+ F MAG5TA TO R$ 9CR1SES
HUE BY "O /EP  ! CYCLE WRAPS  :ILE GO+ !
O!R WAY IS A FIVE-/EP MOVE4
,! RESULT IS A #AG-COMM& MA*9E3 !
NO-HUE-*ANGE R[ PU%ES & POPS2 ! "O-/EP
R[ ADDS1 SUBTRACTS1 MULTIPLIES2 TWO /EPS
DIVIDE1 MODULO1 ,,N2 ?REE /EPS COMP>E1
/E] ! PO9T]1 SWIT* ! CODEL *OOS]2 F\R
/EPS DUPLICATE1 ROLL1 9PUT NUMB]S2 FIVE
/EPS D "* ,I_/,O4 ,PU% HAS A B1UTI;L
QUIRK  X PU%ES ! SIZE ( ! COLOR BLOCK J
LEFT1 S ! PHYSICAL >EA ( A REGION ( PA9T
IS A NUM]IC LIT]AL4.<CITE3 .<,PIET COMM&
TABLE  ! FULL #AG-COMM& HUE_/LI<T;S
MATRIX & ! BLOCK-SIZE PU%.>.>
,FL[ 3TROL = PA9T]S
,! DIREC;N PO9T] />TS AT ! UPP]-LEFT
CODEL MOV+ "R1 A3OMPANI$ BY A CODEL
*OOS] "<,,CC"> T BR1KS TIES :5 S"EAL
BLOCKS QUALIFY Z 8NEXT40 ,:5 ! ,,DP HITS
A BLACK WALL X _C CROSS1 ! *OOS] FLIPS1
!N ! PO9T] ROTATES CLOCKWISE  & IF E
ORI5TA;N IS WALL$ 91 ! PROGRAM 5DS4 ,!
ONLY WAY TO T]M9ATE A ,PIET PROGRAM IS
TO TRAP ! PO9T] 9 BLACK PA9T4 ,LOOPS >E
PA?S >.D ! CANVAS2 BRAN*ES >E CORRIDORS2
! PO9T] & SWIT* COMM&S LET DATA /E]
EXECU;N MID-FLI<T4 ,! :OLE ?+ IS A MAZE
T COMPUTES4.<CITE3 .<,PIET EXECU;N MODEL
,,DP_/,,CC /E]+1 BLACK-WALL BLOCK+1 & !
ONLY T]M9A;N PA?.>.>
,& X IS N A TOY 9 ! =MAL S5SE3 ,PIET IS
,TUR+-COMPLETE :5 ! /ACK IS UNB.D$  A
RESULT DEMON/RAT$ 3CRETELY BY ! EXI/;E (
A ,BRA9FUCK 9T]PRET] WRITT5 9 ,PIET1 AN
AB/RACT PA9T+ T EXECUTES ANO!R
LANGUAGE'S CODE4 ,BRA9FUCK1 ! LANGUAGE
DESIGN$ TO 2 Z SMALL Z POSSIBLE1 0
IMPLE;T$ 9 ! LANGUAGE DESIGN$ TO 2 Z
PRETTY Z POSSIBLE4.<CITE3 .<,PIET
COMPUTA;NAL CLASS  ! UNB.D$-/ACK CAV1T &
! ,PIET-HO/$ ,BRA9FUCK 9T]PRET].>.>
,2C ! PROGRAM IS ! TRANSI;NS1 "9"9ANY
,PIET PROGRAM C 2 RECOLOR$"9"9  %IFT !
5TIRE PALETTE "O HUE /EP & X / RUNS
ID5TICALLY4 ,PIET IS ! ONLY LANGUAGE )
TRUE 8SK9S40
,": X SITS 9 ! W+
,! ESOLANG CANON BROKE "O ASSUMP;N EA*3
,,9T]CAL BROKE S]I\S;S1 ,BRA9FUCK SIZE1
,MALBOLGE ! PROGRAMM]1 ,:ITESPACE
VISIBIL;Y1 ,2FUNGE DIM5.NAL;Y1 ,UNLAMBDA
V>IABLES1 ,,LOLCODE VOCABUL>Y1 &
,%AKESPE>E ! ID5T;Y ( CODE Z CODE4 ,PIET
BROKE ! LA/ ASSUMP;N /&+  T A PROGRAM IS
TEXT4 ,XS ANSW] IS A PRO( BY PA9T+3
"EY?+ A ,TUR+ MA*9E NE$S C 2 EXPRESS$ 9
>1S ( FLAT COLOR1 & ! RESULT IS1
G5U9ELY1 ! ONLY S\RCE CODE 9 ? WIKI T
IMPROVES A ROOM4
,*ECK YR "U/&+
- .< .> ,:AT DET]M9ES : COMM& A ,PIET
COLOR BLOCK EXECUTES  XS COLOR1 OR "S?+
ELSE8 - .< .> ,:AT D BLACK & :ITE BLOCKS
D TO ! DIREC;N PO9T]8 - .< .> ,:AT DOES
PU% ACTUALLY PU% ONTO ! /ACK8 - .< .>
,H[ DOES A ,PIET PROGRAM T]M9ATE8
#A  N XS COLOR  ! "9"9TRANSI;N"9"9 9 HUE
& LI<T;S 2T ! PREVI\S BLOCK & ! 5T]$
BLOCK SELECTS ! COMM&4 #B  "9"9:ITE"9"9
IS PASS-"? "<! PO9T] SLIDES ACR1 EXECUT+
NO?+">2 "9"9BLACK"9"9 IS IMPASSABLE &
=CES PO9T]_/*OOS] RETRIES4 #C  !
"9"9NUMB] ( CODELS 9 ! BLOCK J LEFT"9"9 
! LIT]AL IS ! PA9T'S PHYSICAL >EA4 #D 
ONLY :5 ! PO9T] IS COMPLETELY TRAPP$ BY
BLACK 9 E DIREC;N & *OOS] /ATE  "! IS NO
HALT 9/RUC;N4