Hi Boaz,
What you are showing would be accomplished with the Heatmap option from Graph Builder. Please refer to this script for an example:
dt = Open( "$SAMPLE_DATA/Wafer Stacked.jmp" );
dt:X_Die << Set Modeling Type( "Ordinal" );
dt:Y_Die << Set Modeling Type( "Ordinal" );
dt << Graph Builder(
Size( 554, 521 ),
Show Control Panel( 0 ),
Variables( X( :X_Die ), Y( :Y_Die ), Color( :Defects ) ),
Elements( Heatmap( X, Y, Legend( 4 ) ) )
);