Add someone else's TCL/TK code to the Go language 2

This is a creation in Article, where the information may have evolved or changed.

A a TCL/TK code from the Internet to add her to the Go language

package main
Import "Github.com/nsf/gothic"
//WM geometry. 300x30+100+100
Const INIT_SCRIPT = '
Pack [canvas. c]
. C Create Rectangle 60-fill grey-tag enterleave
. C Create rect Angle 60-fill Grey-tag enterleave
. C Create Rectangle (100-fill grey-tag enterleave
. C Create Rectangle 100-fill Grey-tag enterleave
. C bind Enterleave <Enter> {. c itemconfig Current-fill Green}
. C bind Enterleave <Leave> {. c itemconfig current-fill Grey}
'
Func main () {
    ir: = Gothic. Newinterpreter (init_script)

    <-ir. Done
}

b in the Liteide run, the effect is as follows (when the mouse cursor moves to the rectangle will vary)