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diff --git a/Master/texmf-dist/doc/metapost/featpost/example/avalzero.mp b/Master/texmf-dist/doc/metapost/featpost/example/avalzero.mp
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+% avalzero.mp
+% L. Nobre G. 
+% 1999
+
+verbatimtex \documentclass{article} \usepackage{palatino} \usepackage{concmath} \usepackage{ccfonts} \begin{document} etex
+
+beginfig(1); 						% crescente
+	numeric u;
+	u = 1in;
+	draw fullcircle scaled 2u;
+	draw (left--right) scaled u;
+	draw (down--up) scaled u;
+	draw (left--up) scaled u;
+	draw (left--down) scaled u;
+	path int, cresc, out;
+	int = halfcircle rotated -90 scaled (2*1.414u) shifted ((-0.999,0)*u);
+	out = halfcircle rotated -90 scaled 2u;
+	cresc = buildcycle( int, reverse out ); 
+	fill cresc withcolor 0.5white;
+	draw cresc withpen pencircle scaled 1pt;
+endfig;
+
+beginfig(2); 						% trapezio
+	numeric u, ind, esq[], rig[], h[], ch;
+	pair hlab[];
+	u = 0.55in;
+	ch = 0;
+	for ind=0 upto 4:
+		esq[ind] = -abs(((normaldeviate)-1.5)*u); 
+		rig[ind] = abs(((normaldeviate)+1.5)*u); 
+		h[ind] = (abs((normaldeviate)+0.25)*u/4)+2mm+ch;
+		ch := ch+h[ind];
+	endfor; 
+	draw (esq0,h0)--(rig0,h0);
+	for ind=1 upto 4:
+		draw (esq[ind-1],h[ind-1])--(esq[ind],h[ind]);
+		draw (rig[ind-1],h[ind-1])--(rig[ind],h[ind]);
+		draw ((esq[ind],h[ind])--(rig[ind],h[ind])) dashed evenly;
+		hlab[ind] = (0,(h[ind]+h[ind-1])/2);
+	endfor;
+	draw (esq4,h4)--(rig4,h4);
+	draw ((0,h0)--(0,h4)) dashed evenly;
+	label.rt( btex $h_1$ etex, hlab1 );
+	label.rt( btex $h_2$ etex, hlab2 );
+	label.rt( btex $h_3$ etex, hlab3 );
+	label.rt( btex $h_4$ etex, hlab4 );
+	label.top( btex $l_0$ etex, ((rig0+esq0)/2,h0) );
+	label.top( btex $l_1$ etex, ((rig1+esq1)/2,h1) );
+	label.top( btex $l_2$ etex, ((rig2+esq2)/2,h2) );
+	label.top( btex $l_3$ etex, ((rig3+esq3)/2,h3) );
+	label.top( btex $l_4$ etex, ((rig4+esq4)/2,h4) );
+endfig;
+
+beginfig(3);						% olimpiad
+	numeric u;
+	u=1in;
+	path squr, arcir, vert, horiz, area;
+	squr = unitsquare scaled u;
+	arcir = halfcircle scaled 2u;
+	vert = (origin--up) scaled u shifted (u/2,0);
+	horiz = (origin--right) scaled u shifted (0,u/2);\
+	area = buildcycle( vert, arcir, horiz );
+	fill area withcolor 0.5white;
+	draw area withpen pencircle scaled 1pt;
+	draw squr;
+	draw arcir cutafter squr;
+	draw vert;
+	draw horiz;
+endfig;
+
+beginfig(4);						% ortoproj
+	numeric u;
+	u=1in;
+	draw unitsquare scaled u;
+	path one, two;
+	one = (0.5,0)--(0.5,0.5)--(1,1);
+	two = (0,1)--(0.5,0.5);
+	draw one scaled u;
+	draw two scaled u;
+	draw currentpicture shifted (0,1.5u);
+endfig;
+
+verbatimtex \end{document} etex
+
+end;