Changes

Also note that in order to specify the size of the pen in {{code|1=MyPens[j]}} we have to say {{code|1=((2+j)*pt)}} in order for Metapost to interpret correctly the desired size of the pen.The outer parentheses are to prevent MetaPost from interpreting the definition as <texcode>MyPens[j] := (pencircle scaled (2+j)) * pt ;</texcode>which would result in an error. [[Category:Metapost]]