How to add slow zoom in and zoom out in ffmpeg

Question

My code is ffmpeg -t 5 -i temp/1/i/1.png -t 5 -i 1.mp3 -t 5 -i temp/1/i/2.png -t 5 -i 2.mp3 -t 5 -i temp/1/i/3.png -t 5 -i 3.mp3 -t 5 -i temp/1/i/4.png -t 5 -i 4.mp3 -filter_complex "[0:v]zoompan=z='zoom+0.001':y='427':x='948'[0]; [2:v]zoompan=z='zoom+0.001':y='530':x='1000'[2]; [4:v]zoompan=z='zoom+0.001':y='0':x='472'[4]; [6:v]zoompan=z='zoom+0.001':y='0':x='48'[6]; [0][1][2][3][4][5][6][7]concat=n=4:v=1:a=1[vv][a];[vv]format=yuv420p[v]" -map "[v]" -map "[a]" output.mp4