About 25 years ago (gosh that's a long time), I had Atari Logo on the Atari 800 and was able to remember enough from then to get a filled circle:
make "x 0 repeat 100 [make "x :x+.01 repeat 360 [fd :x rt 1]]
About 25 years ago (gosh that's a long time), I had Atari Logo on the Atari 800 and was able to remember enough from then to get a filled circle: