is it possible to draw a drawing from scratch with SW drawing?

hi,

i want to draw a very simple drawing which consisting 7 lines, i have checked SW drawing, it seems drawing merely can derive from model.

i want draw from scratch. 

AutoCAD can do that. On the one hand, i don't have it, on the other hand, i have forgot what i had learned in Autocad class five years ago.

is there any way?

Max