When web claims web-cursor is /data/ { set parsed [split $data ,] lassign $parsed a b x y Wish $this is labelled "x: $x \ny: $y" set x [expr {$x - 200}] set y [expr {$y - 200}] Wish $this draws a circle offset [list $x $y] Wish $this is outlined white } Wish the web server handles route "/web-cursor" with handler { html { Status
} }