I recently made a TV antenna to receive Channel 5 using a paper clip
and 3 feet of rolled up aluminum foil. It works pretty well, but
there are these diagonal lines that keep "swimming" across the screen
from left to right. Also, there's a little room for improvement in
the picture. Does anyone know how I can improve my antenna to get a
much clearer picture? Maybe I should use tin foil instead of aluminum
foil or something like that? Any ideas?

Thanks for all your help.