Create Block Definition - Reusable Contents

Draw the objects and make 3 copies

Home tab > Block panel > Create

Name: Chair

Base Point: Pick point

Pick a point on the object as a base point

X, Y coordinates indicate on the dialog box
Objects: Retain
Behavior: Allow Exploding
Click Select objects

Cross-select all the objects

16 objects selected, and a image show on top

Objects remain separate

Repeat the command
Pick the base point for the 2nd objects
Objects: Convert to block
Behavior: Check "Scale uniformly"
Click Select objects

Cross-select all the objects
16 objects selected and a image show on top

The insert point show as a grip at the top of the block
All objects grop into one

Repeat the command
Pick a base point on the 3rd objects
Objects: Delete
Behavior: Uncheck both Scale uniformly and Allow exploding
Click Select objects

Cross-select all objects
16 objects selected and a image show top
Click OK
All objects delete from the drawing

When a block insert on the different layer, it will inherit the properties of the current layer