Pan-tilt code install failed> Missing demo - help please

[wheelocknet]

admin@pi:~ $ git clone https://github.com/ArduCAM/PCA9685.git Cloning into 'PCA9685'... remote: Enumerating objects: 52, done. remote: Counting objects: 100% (52/52), done. remote: Compressing objects: 100% (50/50), done. remote: Total 52 (delta 9), reused 31 (delta 0), pack-reused 0 Receiving objects: 100% (52/52), 248.00 KiB | 7.51 MiB/s, done. Resolving deltas: 100% (9/9), done. admin@pi:~ $ cd PCA9685/ admin@pi:~/PCA9685 $ make make: *** No targets specified and no makefile found. Stop. admin@pi:~/PCA9685 $