I have this 2 magick sentence working perfectly:
convert SRC_logo -fill white -font Arial.ttf -pointsize 20 \-gravity center -annotate 0 'TEXTE' EXIT_logo
convert BKG_full \( EXIT_logo -resize 50% \) -geometry +100+100 -compose over -composite BKG_full
Can i wrote that in 1 sentence ?
has you maybe allready understood im ritting TEXT on a logo then i reduce it 50% then im adding it on a background image.
Thank you everyone for your help.

D.