sp³ compound

Ethane - note tetrahedral geometry about each carbon
You should rotate this molecule to see it from all sides.

sp² compound

Ethene - note planar geometry and 120° angles
You should rotate this molecule to see it from all sides.

sp compound

Ethyne - note linear geometry
You should rotate this molecule to see it from all sides.

cis-1,2-dimethylcyclobutane

trans-1,2-dimethylcyclobutane

staggered ethane

eclipsed ethane

anti butane

eclipsed butane

gauche butane

cyclobutane
 

cyclopentane
 

cyclohexane - CHAIR

cyclohexane - BOAT

cyclohexane - TWIST-BOAT