@ Fresher
You seem to be constantly asking questions about things you can't do or don't understand - because you are constantly trying to learn and play things way beyond your ability level.
People keep advising you to just follow the beginner course and be patient.
Take it steady and learn to play the instrument properly a bit at a time.
For your benefit, and anyone else wanting it written out, tthe strum pattern is a two-bar pattern.

Learn it slowly, very slowly, by setting up a tempo of your own or using a metronome at a slow tempo, then play only muted hits across the strings (by resting your fretting hand on the strings, not pressing) and play the pattern over and over and over again until you have it firmly embedded in to your brain and muscles..
Then speed up a bit at a time.
Then play it with one chord and one chord only.
Then introduce a chord change.
Then try to apply it to the chord progression of the song.
This will take more than an hour - it may take days and weeks.