#!/usr/bin/wish
 # what: Departure/Arrival Style Text Presenter

 canvas .c -width 800 -height 100
 pack  .c
 .c create rect {0 0 20 100} -outline darkgreen  -fill darkgreen
 .c create rect {780 0  800 100} -outline darkgreen  -fill darkgreen
 .c create rect {0 0 800 30} -outline darkgreen  -fill darkgreen
 .c create rect {0 70 800 100} -outline darkgreen  -fill darkgreen

 set alfa [ list { } A B C D E F G H I J K L M N O P Q R S T U V X Y Z 0 1 2 3 4 5 6 7 8 9 : . , ; ]
 set Lref [ join $alfa {} ]
 set alfa [ join $alfa \n ]

 set text_x 100
 set text_y 30
 set text_xd 20

 for {set idx 0} {$idx < 32} { incr idx} {
        set text_coords [ list $text_x $text_y ]
        set text_tags [ list P$idx Text ]
        .c create text $text_coords \
                -text $alfa \
                -anchor ne \
                -font {-size 28} \
                -tags $text_tags \

        incr text_x $text_xd
 }

 set Dtext "HANNOVER LH534 19:30 DELAYED 30MIN      "
 .c lower Text

 for {set idx 0} {$idx <= 32} { incr idx} {
        set L [ string index $Dtext $idx ]
        set offs [ string first $L $Lref ]
        puts stderr "L:$L offs:$offs"
        set offs [ expr $offs * 40 ]
        set wait 0
        set del 1

        while { $wait < $offs } {
                .c move P$idx 0 -1
                after $del incr wait
                vwait wait
                if {($offs - $wait) < 4 } {
                        set del 50
                } elseif {($offs - $wait) < 14 } {
                        set del 20
                }
        }
 }
----
See [text] for more details 
[UK] the text widget does not realy apply here.
I wrote this to have something similar to the "faling segment" type presenters you see used at airports and trainstations using a [canvas] and  moving text items.


[Category Example] | [Category Text Widget]