[R] Help Creating a Stacked Bar Chart with Color Coding

[Majonu]

I have a data set of the following form:

Johnson     4     
Smith        4
Smith        2
Smith        3
Garcia       1
Garcia       4
Rodriguez   2
Adams       2
Adams       3
Adams       4
Turner       4
Turner       3

And I'd like to create a stacked bar chart that has scores on the x-axis and
the bars are broken up by judges name. Whenever I try to do this though
(barplot(table(judges,scores)) it always creates more groups than actual
judges. Would anyone know how to graph this and color code the names
appropriately? 
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