d = new FunctionDialog();
d.setFunction("cos(x)^2");
d.setPoints(200);
d.setRange(-10,10);
d.setDestination(2);
d.setLabel();

st = newStyle();
st.setColor("red");
d.setStyle(st);

sy = newSymbol();
sy.setType(10);
d.setSymbol(sy);

d.Apply();

w = activeWorksheet();

line = w.getLine(0);
line.setStartPoint(0.1,0.1);
line.setEndPoint(0.3,0.3);
line.setColor("red");
w.setLine(0,line);

r = w.getRect(0);
r.setStartPoint(0.4,0.4);
r.setEndPoint(0.2,0.2);
r.setFilled(true);
r.setFillColor("green");
w.setRect(0,r);

w.redraw();