need help with a tiny piece of code editing an array.

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so I have something like…

canvasItems = [
        { 
            Text:"This is ImageCanvas 1"
            TextAttrs:{Color:"#FFFFFFFF", Font:"Medium",
            HAlign:"HCenter", VAlign:"VCenter",
            Direction:"LeftToRight"}
            TargetRect:{x:390,y:357,w:500,h:60}
        },
        { 
            Text:"This is ImageCanvas 2"
            TextAttrs:{Color:"#FFFFFFFF", Font:"Medium",
            HAlign:"HCenter", VAlign:"VCenter",
            Direction:"LeftToRight"}
            TargetRect:{x:390,y:357,w:500,h:60}
        },
        { 
            Text:"This is ImageCanvas 3"
            TextAttrs:{Color:"#FFFFFFFF", Font:"Medium",
            HAlign:"HCenter", VAlign:"VCenter",
            Direction:"LeftToRight"}
            TargetRect:{x:390,y:357,w:500,h:60}
        }
    ]

I’ve previously been changing the text color by a roByteArray conversion

								
fadelevel = CreateObject("roByteArray")
fadelevel.fromhexstring(device.nextoverlayfontcolor)
fadelevel[0] = fadelevel[0] - 8   ' or whatever values.									
canvasitems = [
            Text:"This is ImageCanvas 3"
            TextAttrs:{Color:"#" + fadelevel.tohexstring(), Font:"Medium",
            HAlign:"HCenter", VAlign:"VCenter",
            Direction:"LeftToRight"}
            TargetRect:{x:390,y:357,w:500,h:60}
		]
canvas.SetLayer(0, {Color:"#FF000000", CompositionMode:"Source"}) 
canvas.SetLayer(1, canvasItems)
   canvas.Show()

And that worked fine for one canvas Item. My question is how do I roll thru an array of canvas items and change a value in all the TextAttrs nested Arrays?