Asamyukata hasta means hand gesture using one hand only. Therefore only one hand will be needed to convey the meaning to the audience. There are 32 one handed hand gesture, however we will focus on the first five of the 32 gestures.
Pataka is where all the fingers are held sraight together. There should be no gaps between each fingers. It is used to indicate clouds, forest, wind etc.
In tripataka, all fingers are held together just like pataka but the fourth finger bends down. It is used to indicate a tree, an arrow, a lamp etc.
Similar to the first and second hand gesture, you only bend your fourth and fifth finger a little to create ardhpataka. It is used to indicate a knife, a banner, a tower etc.
For katarimukha, the pinky and the fourth finger go to the thumb. at the same time, the index finger and the middle finger stretch out into a victory sign. It is used to indicate scissors, death, lightning etc.
The fourth finger bends down to touch the index finger. All other fingers will be straight and no gaps will be in between in any of the fingers.