1.  Wait Block:  Do a one block command until a condition is met.

Wait Block Example:  Go forward unlimited until touch sensor activated.  Stop after Touch sensor activated.

2.  Switch Block (If - Else Statement):  If one condition is true, do one set of commands.  Else, do another set of commands.

Switch Block Example:  Line following:   If too dark, C motor runs and B motor stops.  If too light (else) B motor runs and C motor stops.

3.  Loop Conditional:  Repeat what is inside the loop until a condition is met. 

Loop Conditional Example:  Do the "Line Follow Program" until the touch sensor is activated.  Then stop.

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