A Random

SCIFI.radio story

Earth transforms into a living canvas for intergalactic graffiti artists who are friendly but incomprehensible even though they all do bad impressions of William Shatner who tend to stutter under pressure when confronted by the army, navy, air force, space force and/or marines , but scientists create a new weapon which turns them into weird rocks.
The End.and then they kill us all.
The End.