ParametricPlot(funcs,[parameters], ...)
ParametricPlot((cos(x), sin(x)), (x, 0, 2π),fill=True)
ParametricPlot((sin(7x), cos(8x)), (x, 0, 2π),color="green")
ParametricPlot((sin(x), sin(2x)), (x, 0, 2π), color="green",fill=true)
