As i saw the paths of pein in the akatsuki custume, i grined then i start by focusing on my chakra system then i turn my raw chakra into katon chakra by heating it up further more i channel my chakra from my lungs to my throat and then my mouth and then i focus harder and turn the katon chakra in my mouth to a stream of fire then i finish by exhaling it out, producing a stream of fire at the paths of pein.
Also, looking at the set of dummies, i knew what i was supposed to do. Then at once, i make the required six handseals(snake, ram, monkey, boar, horse, tiger) in that order then i focus on my chakra flow, then i continue further by turning my raw chakra into katon chakra by heating up my raw chakra then from my lungs, i channelled the katon chakra to my throat and then my mouth and i then use my index finger and my thumb to form a ring which i place near my mouth and then i focus even move to turn the katon chakra into fire and shape manipulate it into a ball which i spit out, going through the ring and then forming the ball of fire at the dummies.
As his sensei throws the lighter, he quickly catches it then takes a deep breath and says "im ready sensei" and as his sensei throws the several shurikens, he quickly focuses on his chakra flow and turns his raw chakra into katon chakra which he further channels into the lighter and throws it forward to give an open flame and at almost the same time, he focuses on the katon chakra in the lighter and quickly expands it to form a wall of flames which burns the incoming shurikens as the shurikens come in contact with the wall.