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3. Commands > More LOGO Commands
3.2. COMMANDS | More Command 1 | More Command 2 | More Command 3 |
3.2.1. More Command 1
Command: <FENCE>
Function: At times, you might give a command for the turtle to move which will take it beyond the screen. The <FENCE> command creates a fence around the screen so that the turtle cannot go beyond the screen.
Syntax: FENCE <Enter>
Example:
FENCE <Enter>
RT 80 <Enter>
FD 600 <Enter>
Result: A message Turtle out of bounds appears and the figure is displayed, truncated at the right end of the screen.
3.2.2. More Command 2
Command: <WRAP>
Function: The <WRAP> command allows the turtle to reappear on the other end of the screen once the edge is reached.
Syntax: WRAP <Enter>
Example:
WRAP <Enter>
RT 80 <Enter>
FD 600 <Enter>
Result: When the screen is in Wrap Mode, as the edge of the screen is reached, turtle appears at the other end, drawing the balance part of picture.
3.2.3. More Command 3
Command: Nested <REPEAT> (Repeat within Repeat)
Function: The REPEAT command when given inside another REPEAT command.
Example 1:
REPEAT 2 [REPEAT 4 [FD 40 RT 90] RT 90] <Enter>
Result: Two squares are shown in the figure below.
Figure for Example 1
Example 2:
REPEAT 2 [REPEAT 6 [FD 80 RT 60] RT 120] <Enter>
Figure for Example 2
Example 3:
REPEAT 2 [REPEAT 8 [FD 30 BK 30 RT 45] PU FD 40 PD] <Enter>
Figure for Example 3
Example 4:
REPEAT 12 [REPEAT 6 [FD 40 LT 60] RT 30] <Enter>
Figure for Example 4
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