Because it is written in Squeak Smalltalk, Scratch does support late binding as illustrated by this script:
I could tweak the size slider while the program was still running to produce a whole variety of new coloured squares on top of the original squares:
For more on late binding see:
why learn etoys squeak?
morphic / etoys is superior GUI and programming development system
late binding references
etoys (late binding)
RBC models — the art of missing the point completely - from Lars Syll Vielleicht ist diese Grundperspektive der radikalen Trennung von Form und Gehalt hilfreich, einige zunächst überaus paradoxe Äußerungen v...
2 hours ago