Step one:
First draw two diagonal lines.
Step 2:
Connect them with a small fold line in the middle.
Step 3:
Draw two longer diagonal lines and connect them with small polylines.
Step 4:
Use the same method to draw a larger shape like this.
Step 5:
Then connect the two lines vertically to form the trunk.
Step 6:
Then use the same method to draw a smaller pine tree next to it.
Step 7:
Finally, apply a nice color and the pine tree is ready.