To give the squiggle an unkempt appearance, the animation drawings were inked on rice paper. The ink bled, creating a textured line that was then photocopied onto cel.
The dot's vital statistics are 36-36-36.
The popular artistic toy, Spirograph, made good use of the concept of lines and circles as illustrated here.
Rival animation studio WB would use dots and lines in their new opening credits for the Warner Brothers Seven Arts collaboration in the same era. Abstract was in!