documentclass{standalone}
usepackage{tikz}

begin{document}
begin{tikzpicture}
draw[fill] (0,0) circle (.5) -- ++(10:2) circle (.5) -- ++(-20:2) circle (.5);
end{tikzpicture}
end{document}

documentclass{article}
usepackage{tikz}

begin{document}

begin{tikzpicture}
tikzset{bead/.style={circle,fill=black,inner sep=3pt}}

draw node[bead] {} (0,0)
foreach angle in {10,40,50,-50,0,150,30,-60,45,45,0}
  { -- ++(angle:1) node[bead] {}};
end{tikzpicture}

end{document}

documentclass{article}
usepackage{tikz}

begin{document}

begin{tikzpicture}
tikzset{bead/.style={circle,fill=black,inner sep=3pt}}
defangle{0}

draw node[bead] {} (0,0)
foreach stepangle[evaluate=stepangle as angle using angle+stepangle, remember=angle] in {10,20,-30,-60,135,-20,-30,0}
  { -- ++(angle:1) node[bead]{}};
end{tikzpicture}

end{document}

size(300,300);
real linkLen=1, linkWidth=2pt;
real rl=2+linkLen;              // distance between beads
guide g=(1,0)--(1+linkLen,0);   // a link
pen beadColor=orange;
pen linkColor=beadColor;
void bead(transform t){
  draw(t*g,linkColor+linkWidth);
  radialshade(t*unitcircle,
    beadColor,shift(t)*(-0.4,0.3),0.01
   ,black,shift(t)*(-0.4,0.3),1.5);
}
pair operator>(pair pos=(0,0), real phi){
  transform t=shift(pos.x,pos.y)*rotate(phi);
  bead(t); // draw a bead with a link
  pos+=rl*(Cos(phi),Sin(phi)); // Sin, Cos - in degrees, sin, cos - in radians
  return pos;
};

pair pos=(0,0); // start point

if(exp(1)>pi){ // note that ">" still works the usual way to compare numbers
  // this branch is skipped
}else{
  pos=pos>0>45>-45>90>135; // draw a bead chain and update the position
  pos>0>45>-45>90>135;     // continue the chain without updating the start position
  beadColor=lightyellow;
  linkColor=lightblue;
  pos>90>90>90;           // draw another branch from saved position, with different colours
}

documentclass[10pt,a4paper]{article}
usepackage{lmodern}
usepackage{soul}
usepackage{caption}
usepackage[inline]{asymptote}
defasydir{}
begin{asydef}
// Global Asymptote definitions
real linkLen=1, linkWidth=2pt;
real rl=2+linkLen;              // distance between beads
guide link=(1,0)--(1+linkLen,0);   // a link
pen beadColor=orange;
pen linkColor=beadColor;
void bead(transform t){
  draw(t*link,linkColor+linkWidth);
  radialshade(t*unitcircle,
    beadColor,shift(t)*(-0.4,0.3),0.01
   ,black,shift(t)*(-0.4,0.3),1.5);
}
pair operator>(pair pos=(0,0), real phi){
  transform t=shift(pos)*rotate(phi);
  bead(t); // draw a bead with a link
  pos+=rl*(Cos(phi),Sin(phi)); // Sin, Cos - in degrees, sin, cos - in radians
  return pos;
};
pair pos;
end{asydef}

begin{document}

newcommandhi[1]{bf Hello st{Word} #1!}

center
captionof{figure}{Example of bead chain building.}
begin{asy}
  size(150,150);
  pos>0>60>0>70;
  beadColor=lightyellow;
  pos>0>-60>0>-70;
  pos=  pos>0>0>0>0;
  label("textbf{Example}",pos,SE);
end{asy}

center
captionof{figure}{Another example of bead chain building.}
begin{asy}
  size(150,150);
  beadColor=lightyellow;
  linkColor=lightblue;
  pos=pos>90>42>0>0>0>0>0>0>-130;
  label(
     "parbox{8cm}{"
     "The following command texttt{textbackslash hi} is defined \"
     +"in the main LaTeX document:\"
     "hi{LaTeX}}"
     ,pos);
end{asy}

end{document}

sub asy {return system("asy '$_[0]'");}
add_cus_dep("asy","eps",0,"asy");
add_cus_dep("asy","pdf",0,"asy");
add_cus_dep("asy","tex",0,"asy");

documentclass[pstricks,border=12pt]{standalone}
usepackage{pst-plot}

defX(#1){#1}
defY(#1){3+2*sin(#1)}

psset{algebraic,showpoints,dotscale=3}

begin{document}

begin{pspicture}(-1,-1)(7,6)
    psparametricplot[plotpoints=10]{-0.5}{6.5}{X(t)|Y(t)}
end{pspicture}
end{document}

end{document}

documentclass[pstricks,border=12pt]{standalone}
usepackage{pst-plot}

defX(#1){#1}
defY(#1){3+2*sin(#1)}

psset{algebraic,showpoints,dotscale=3}

begin{document}

multido{i=2+1}{21}{%
begin{pspicture}(-1,-1)(7,6)
    psparametricplot[plotpoints=i]{-0.5}{6.5}{X(t)|Y(t)}
end{pspicture}}
end{document}

end{document}

documentclass[pstricks,border=12pt]{standalone}
usepackage{pstricks-add}

begin{document}

begin{pspicture}[showgrid](-1,-1)(8,3)
    psStartPoint(0,0)
    psforeach{i}{10,40,50,-50,0,150,30,-60,45,45,0}{psVector[arrows=-*](1;i)}
end{pspicture}

end{document}

documentclass[pstricks,border=12pt]{standalone}
usepackage{pst-node}

begin{document}

begin{pspicture}[showgrid](-1,-1)(8,3)
    pnode(0,0){A}
    psforeach{i}{10,40,50,-50,0,150,30,-60,45,45,0}{
    pnode[!1 ispace PtoC](A){B}
    pscircle*(B){4pt}
    psline(A)(B)
    pnode(B){A}
    }
end{pspicture}

end{document}

draw (0,0) [turtle={beads, right=10, forward, left=20, forward, …}];

draw (0,0) [turtle={beads,turn and step/.list={10,20,-30,-60,135,-20,-30,0}}] [bead];

documentclass[tikz]{standalone}
usetikzlibrary{turtle}
tikzset{
    bead node/.style={circle,fill=black,inner sep=3pt},
    bead path/.style={to path={ [bead] -- (tikztotarget)}},
    bead/.style={insert path={node[bead node]{}}},
    turtle/beads/.style={how/.style={bead path},right},
    turtle/turn and step/.style={left=#1,forward}
}
begin{document}
begin{tikzpicture}[turtle/distance=1cm]
draw (0,0) [turtle={beads,turn and step/.list={10,20,-30,-60,135,-20,-30,0}}] [bead];
end{tikzpicture}
end{document}

documentclass[margin=.25cm]{standalone}
usepackage{tkz-graph}

begin{document}
begin{tikzpicture}
GraphInit[vstyle=Art]% Init the graph and choice a style
SetVertexNoLabel% no label
Vertex{A}
foreach a in {45,10,30,-20,0,-60,-40,-45,-10,-90,+20,0,60,-40}{%
begin{scope}[shift=(A)]% polar from the last vertex
    Vertex[a=a , d=1 cm]{B}
    Edge[style={thick,double=black,double distance=1pt}](A)(B)
    pgfnoderename{A}{B}% rename the node, useful macro here
end{scope}
}
end{tikzpicture}

end{document}

newcommand{newVertex}[1]{%
begin{scope}[shift=(A)]
    Vertex[a=#1 , d=1 cm]{B}
end{scope}
}

foreach a in {45,10,30,-20,0,-60,-40,-45,-10,-90,+20,0,60,-40}{%
    newVertex{a}
    Edge[style={thick,double=black,double distance=1pt}](A)(B)
    pgfnoderename{A}{B}
}