B4J Question How to set the canvas background color?

[positrom2]

The canvas background color is not changed by any of those lines commented (when uncommenting).

Sub AppStart (Form1 As Form, Args() As String)
  MainForm = Form1
  cvs.Initialize("cvs")
      MainForm.RootPane.AddNode(cvs, 0, 0,200,200)  'MainForm.Width/2, MainForm.Height/2)
      'MainForm.BackColor=fx.colors.Green
      'drawrect(0,0,cvs.Width,cvs.Height/2,fx.colors.yellow,True,0)
      'cvs.style="-fx-background-color: yellow"

How to set the background color?

 

[Daestrum]

canvas1.DrawRect(0,0,canvas1.Width,canvas1.Height,fx.Colors.Red,True,1)

 

[positrom2]

Thank you Daestrum, it works now.