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#! /usr/local/bin/wish
proc drawlines {} {
puts [clock format [clock seconds]]
for {set j 0} {$j < 100} {incr j} {
puts -nonewline "*"
flush stdout
if {$j & 1} {
set c "blue"
} {
set c "red"
}
for {set i 0} {$i < 100} {incr i} {
# .a create line $i 0 0 [expr 500 - $i] -fill $c
}
}
puts [clock format [clock seconds]]
for {set j 0} {$j < 100} {incr j} {
puts -nonewline "*"
flush stdout
if {$j & 1} {
set c "blue"
} {
set c "red"
}
for {set i 0} {$i < 100} {incr i} {
.a create line $i 0 0 [expr 500 - $i] -fill $c
}
}
puts [clock format [clock seconds]]
# destroy .
}
canvas .a -height 500 -width 500
button .b -text draw -command drawlines
pack .a .b -side left
# eof
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