a double-acrostic egg-timer of a poem

for dave on his twenty-ninth birthday

beware time at its saturn ebb

or bar its charismatic echo

it flatters with confetti

liaises an unreal trail

energy loses its core

denies a new thread

effort's a bore

guiltwracking

gimcracking
stagnates

salivates

getcracking

grail tracking

excitatory lore

dreams newly landed

eggs being mythic ore

let this vision prevail

in a cut shell's graffiti

orisons were feasted - ergo

be alive to the next wise orb

first and last lines have 29 letters and spaces

lines starting with same letter rhyme (more or less)