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Step 2: Choose the background “Galaxy” from “Choose a backdrop” icon. Next,
we will learn, how to create the clones of the sprite “planet” and sprite
“missile” (as shown in figure 5.1.2).

5.1 CLONE OF THE SPRITE— “CONTROL” BLOCK
5.1.1 “create clone of ….” block

This block is a “stack” block used to create a clone of the selected sprite from the
list provided in the block. It creates an identical copy of the chosen sprite: however,
its scripts are not copied.

5.1.2 “delete this clone” block
This block is a “cap” block (a block that ends the script). It is used to delete a clone

or copy of the sprite that has already been created.
5.1.3 “when I start as a clone” block

This is a “hat” block (a block that starts the script). It is used to perform the tasks
written under it when a clone of the sprite is created.

Gowri: Steps to create and delete the clone of the sprite “planet” and “missile”.

Step 3: Choose the sprite “planets” and drag and drop the block “when flag click”
in script area. In “forever” block after every 2.5 seconds, a clone of
“planets” sprite is creating. (see figure 5.2)

Aryan: Ok, that’s so simple dear. Now, how can we delete this
clone?

Gowri: Yes, as per game criteria, when a planet is hit by a missile,
its clone gets finished. See the code in figure (5.3):

Step 4: Now choose the sprite “missile” and drag & drop
the block “when flag clicks” in the script area.
Next do the coding in “forever” block. Inside

the “if () then” block, insert “when space key is
pressed” condition, followed by the “create clone Fig. 5.2
of myself” block to create a clone of missile sprite. (see figure 5.4). Create
another script for the same sprite starting with “when I start as a clone”
block. When the sprite “missile” touches the edge of the stage, then it

gets deleted. This code is shown in figure 5.4 in “repeat until” block.

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