Golnaz's Spiral Staircase:

This space curve was produced using the following Maple commands:

> x:=(1+4*sin(t^2))*cos(t);
> y:=(1+4*sin(t^2))*sin(t);
> z:=3*t;

                                      2
                     x := (1 + 4 sin(t )) cos(t)


                                      2
                     y := (1 + 4 sin(t )) sin(t)


                               z := 3 t

> with(plots):
> spacecurve([x,y,z],t=0..6*Pi,numpoints=4000,axes='NORMAL',
>  scaling='CONSTRAINED',orientation=[45,75]);