METAPOST is a programming language created in 1994 by John D. Hobby.
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MetaPost refers to both a programming language and the interpreter of the MetaPost programming language. Both are derived from Donald Knuth's Metafont language and interpreter. MetaPost produces vector graphic diagrams from a geometric/algebraic description. Read more on Wikipedia...
beginfig(2); u=1cm; draw (2u,2u)--(0,0)--(0,3u)--(3u,0)--(0,0); pickup pencircle scaled 4pt; for i=0 upto 2: for j=0 upto 2: drawdot (i*u,j*u); endfor endfor endfig