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BACKGROUND AND BACKGROUND TILES
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#Keen 2 background tiles behave like Keen 3
%patch $724B              $26 $8B $07 $B6 $0D 
%patch $7250  $F6 $FE $F6 $EE $26 $89 $07 $E9 
%patch $7258  $14 $01 

%patch $72A2  $EB $97 
%patch $7327  $E9 $11 $FF 

%patch $572E                          $26 $8B 
%patch $5730  $07 $B6 $0D $F6 $FE $F6 $EE $26 
%patch $5738  $89 $07 $03 $1E $E4 $6B $03 $1E 
%patch $5740  $E4 $6B $26 $89 $07 $90 $90 $90 
%patch $5748  $90 $90


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BORDER AND BORDER COLORS
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To change the border colors see PALETTES AND BORDERS


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BRIDGES AND SWITCHES
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#Change the bridge block (in this it's changed to tile 480) 
%patch $7852 $E0 $01 
%patch $78A1 $E0 $01

#Animating switch
%patch $651D $E0 $01 #This tile when flipped becomes...
%patch $6522 $ED $01 #This tile and...
%patch $653E $ED $01 #This tile when flipped becomes...
%patch $6558 $E0 $01 #This tile.