6 Rollback to Revision 3
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SmileBASIC, 36 23 2123 bytes:

ACLSXON MIC
WAIT 30XSCREEN30XOFF 1MIC

This blinksBlinks the 3D indicatormicrophone status light. (video coming soon)

SmileBASIC, 36 23 21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light.

SmileBASIC, 36 23 bytes

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

5 deleted 173 characters in body
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SmileBASIC, 36 2323 21 bytes:

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light, but I'm not sure if it counts as being "physically located on your keyboard".

SmileBASIC, 36 23 bytes

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light, but I'm not sure if it counts as being "physically located on your keyboard"

SmileBASIC, 36 23 21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light.

4 added 163 characters in body
source | link

SmileBASIC, 36 23 bytes

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light, but I'm not sure if it counts as being "physically located on your keyboard"

SmileBASIC, 36 23 bytes

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

SmileBASIC, 36 23 bytes

XON MIC
WAIT 30XOFF MIC

Blinks the microphone status light. (video coming soon)

21 bytes:

ACLS
WAIT 30XSCREEN 1

This blinks the 3D indicator light, but I'm not sure if it counts as being "physically located on your keyboard"

3 Rollback to Revision 1
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2 added 6 characters in body
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1
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