Create color overlays at the corners of an image in Nuke. Might be helpful for matching colors of a corner pin.

CS_ColorCorners.tcl

set cut_paste_input [stack 0]
version 9.0 v8
push $cut_paste_input
Group {
name CS_ColorCorners1
selected true
xpos 840
ypos -130
addUserKnob {20 CS_ColorCorners}
addUserKnob {20 corner1 l "Bottom Left Corner" n 1}
addUserKnob {14 size1 R 0 100}
size1 1
addUserKnob {41 softness1 T Radial1.softness}
addUserKnob {41 color1 T Radial1.color}
addUserKnob {41 disable1 l disable T Radial1.disable}
addUserKnob {20 endGroup1 n -1}
addUserKnob {20 corner2 l "Bottom Right Corner" n 1}
addUserKnob {14 size2 R 0 100}
size2 1
addUserKnob {41 softness2 T Radial2.softness}
addUserKnob {41 color2 T Radial2.color}
addUserKnob {41 disable2 l disable T Radial2.disable}
addUserKnob {20 endGroup2 n -1}
addUserKnob {20 corner3 l "Top Right Corner" n 1}
addUserKnob {14 size3 R 0 100}
size3 1
addUserKnob {41 softness3 T Radial3.softness}
addUserKnob {41 color3 T Radial3.color}
addUserKnob {41 disable3 l disable T Radial3.disable}
addUserKnob {20 endGroup3 n -1}
addUserKnob {20 corner4 l "Top Left Corner" n 1}
addUserKnob {14 size4 R 0 100}
size4 1
addUserKnob {41 softness4 T Radial4.softness}
addUserKnob {41 color4 T Radial4.color}
addUserKnob {41 disable4 l disable T Radial4.disable}
addUserKnob {20 endGroup4 n -1}
}
Input {
inputs 0
name Input
xpos 840
ypos -250
}
Radial {
area {{-width*size1.w} {-height*size1.h} {width*size1.w} {height*size1.h}}
color {1 0 0 1}
name Radial1
xpos 840
ypos -178
}
Radial {
area {{width-width*size2.w} {-height*size2.h} {width+width*size2.w} {height*size2.h}}
color {0 1 0 1}
name Radial2
xpos 840
ypos -130
}
Radial {
area {{width-width*size3.w} {height-height*size3.h} {width+width*size3.w} {height+height*size3.h}}
color {0 0 1 1}
name Radial3
xpos 840
ypos -82
}
Radial {
area {{-width*size4.w} {height-height*size4.h} {width*size4.w} {height+height*size4.h}}
color {1 1 0 1}
name Radial4
xpos 840
ypos -34
}
Output {
name Output
xpos 840
ypos 38
}
end_group