JMeter Beginner Class 23: How to run Scheduled + Sequential execution

How to run Scheduled + Sequential execution:
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HOW TO RUN A TEST FOR SPECIFIC DURATION
Thread Group - Forever - Scheduler - Duration

Step 1 : Thread Group - make loop count = forever
Step 2: Select Scheduler checkbox
Step 3 : Add duration (sec)

HOW TO RUN PERFORMANCE TEST SEQUENTIALLY
Test Plan - Run Thread Group Consecutively

HOW TO ADD WEBSITES SEQUENTIALLY TO A PERFORMANCE TEST
Thread Group - Forever - Scheduler - Duration + Startup Delay