First couple of suggestions: be lazy, parts making is hard, always search for an existing part first. In this case the 4011 is in core parts in both a single version like the above and a subpart version (where the individual gates can be moved around.) Even if it wasn’t in core parts a google search of the form “fritzing part 4011” may turn up a part (which may or may not be any good) elsewhere on the net or in the forums. That said, the part above is only the .fzp file not the needed .fzpz file (which includes the svg files) so I can’t tell you how good it is. If you post the .fzpz file I’ll have a poke at it.