Thanks Alex.
I just changed Color red and Color bleu with TrachelShape color slightlyDarker.

It works perfect :)
Thanks again.
Abdelghani
On 01 Mar 2018, at 21:53, Alexandre Bergel <alexandre.bergel@me.com> wrote:

v := RTView new.

fiveCircles := RTEllipse new size: [ :e | 40 atRandom + 5 ]; elementsOn: (1 to: 5).
fiveBoxes := RTBox new size: [ :e | 40 atRandom + 5 ]; elementsOn: (1 to: 5).

v addAll: fiveCircles; addAll: fiveBoxes.

v elements do: [ :element | element translateTo: (200 atRandom @ 200 atRandom) ].

v addMenu: 'Red' callback: [ v canvas shapes do: [ :aTrachelShape | aTrachelShape color: Color red ]. v canvas signalUpdate ].

v addMenu: 'Blue' callback: [ v canvas shapes do: [ :aTrachelShape | aTrachelShape color: Color blue ]. v canvas signalUpdate ].
v