Question

Soil forms in _______, which together make up the soil profile.

Answer 1

\documentclass[border=12pt,pstricks]{standalone}

\usepackage{pst-plot,multido}

\psset{algebraic,plotpoints=1000,unit=5,linewidth=10pt}

\begin{document}

\multido{\iA=20+20}{4}{%

\begin{pspicture}(-1,-1.1)(1,0.8)

\psparametricplot[linecolor=red!50,fillstyle=solid,

fillcolor=red!\iA,linejoin=1]{0}{\psPiTwo}%

{sin(t)^3 | (13*cos(t)-5*cos(2*t)-2*cos(3*t)-cos(4*t))/16}

\end{pspicture}}

\end{document}

hello