Richard Suchenwirth 2007-10-04 - Here's a silly little demo, which requires that you have the Webdings font (probably Windows only. If you do, you see an animation of a small strange city with an airplane and two ambulances moving through :^)
#!/usr/bin/env tclsh
package require Tk
pack [text .t -font {Webdings 48} -width 17 -height 4]
.t insert end [string repeat " " 30]j\n
.t insert end ABCDEFGHIJKMPQRST\n
.t insert end "[string repeat " " 30]h h\n"
.t insert end ABCDEFGHIJKMPQRST\n
update
after 500
for {set i 0} {$i <= 64} {incr i} {
if {$i<31} {.t delete 1.0}
if {$i%2==0} {.t delete 3.0}
update
after 300
}
bind . <Escape> {exec wish $argv0 &; exit}