SK T5 : STANDARD LIBRARY (3.1.5 dan 3.1.6)

https://docs.google.com/presentation/d/e/2PACX-1vSvh5iaDYxwBf8eAC4ud85_OS6JVsa14L98NcnLr5bHZMv3dLB3Ll1RJpQlKn0wBKcoC4ltZ1SbPO2_/pub?start=true&loop=false&delayms=10000