Usage:
Graphics[{color,Polygon@Flatten[ParametricPlot[#,domain][[1,1,3,2,1]]&/@{function1,function2,.....},1]}]
Example:
Graphics[Polygon@Flatten[ParametricPlot[#,{t,0,\[Pi]}][[1,1,3,2,1]]&/@{{0.5+(1-0.5)*Cos[t], (0.5-1)*Sin[t]},{-0.5+(1-0.5)*Cos[t],(1-0.5)*Sin[t]}, {Cos[t],Sin[t]}},1]]
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Show[
Graphics[Polygon@Flatten[ParametricPlot[#,{t,0,\[Pi]}][[1,1,3,2,1]]&/@{{0.5+(1-0.5)*Cos[t],(0.5-1)*Sin[t]}, {-0.5+(1-0.5)*Cos[t],(1-0.5)*Sin[t]}, {Cos[t],Sin[t]}},1]],
ParametricPlot[{0.5+0.25Cos[t],0.25Sin[t]},{t,0,2\[Pi]}],
ParametricPlot[{Cos[t],Sin[t]},{t,0,2\[Pi]}],
Graphics[Polygon@ParametricPlot[{-0.5-0.1Cos[t],0.1Sin[t]},{t,0,2\[Pi]}][[1,1,3,2,1]]],
Graphics[{White,Polygon@ParametricPlot[{0.5+0.1Cos[t],0.1Sin[t]},{t,0,2\[Pi]}][[1,1,3,2,1]]}]]
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tm[x_]:={{Cos[x],Sin[x]},{-Sin[x],Cos[x]}}
Animate[Show[
Graphics[Polygon@Flatten[ParametricPlot[#.tm[x],{t,0,\[Pi]}][[1,1,3,2,1]]&/@{
{0.5+(1-0.5)*Cos[t],(0.5-1)*Sin[t]}, {-0.5+(1-0.5)*Cos[t],(1-0.5)*Sin[t]},
{Cos[t],Sin[t]}},1]],
ParametricPlot[{0.5+0.25Cos[t],0.25Sin[t]}.tm[x],{t,0,2\[Pi]}],
ParametricPlot[{Cos[t],Sin[t]},{t,0,2\[Pi]}],
Graphics[Polygon@ParametricPlot[{-0.5-0.1Cos[t],0.1Sin[t]}.tm[x],{t,0,2\[Pi]}][[1,1,3,2,1]]],
Graphics[{White,Polygon@ParametricPlot[{0.5+0.1Cos[t],0.1Sin[t]}.tm[x],{t,0,2\[Pi]}][[1,1,3,2,1]]}]],
{x,2Pi,0}]
Export["~/test.gif",
Table[(x=i*Pi/20;
Show[Graphics[
Polygon@Flatten[ParametricPlot[#.tm[x],{t,0,\[Pi]}][[1,1,3,2,1]]&/@{
{0.5+(1-0.5)*Cos[t],(0.5-1)*Sin[t]},{-0.5+(1-0.5)*Cos[t],(1-0.5)*Sin[t]},
{Cos[t],Sin[t]}},1]],
ParametricPlot[{0.5+0.25Cos[t],0.25Sin[t]}.tm[x],{t,0,2\[Pi]}],
ParametricPlot[{Cos[t],Sin[t]},{t,0,2\[Pi]}],
Graphics[Polygon@ParametricPlot[{-0.5-0.1Cos[t],0.1Sin[t]}.tm[x],{t,0,2\[Pi]}][[1,1,3,2,1]]],
Graphics[{White,Polygon@ParametricPlot[{0.5+0.1Cos[t],0.1Sin[t]}.tm[x],{t,
0,2\[Pi]}][[1,1,3,2,1]]}]]),
{i,40,0,-1}]]
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