The triangle in the middle of logo screen called ........................

.............................is used to put the turtle pen down on the screen ,so that it can draw again when it moves

.................................command is used to erase any mistake or any incorrect lines from your drawing

It is necessary to use …...... command so the turtle can start to draw again after using PENERASE

PENUP(PU)Is used to pick the turtle's pen up from the screen .