MSW Logo

1
MSW Logo

• Drawing Polygons

2
MSW Commands

• To ask the turtle to move I had to use the
  following commands
• FD Moves the turtle forward
• BK Moves the turtle backwards
• RT Turns the turtle to the right
• LT Turns the turtle to the left
• CS Clears the screen
• HT Hides the turtle
• ST Shows the turtle

3
MSW Commands Cntd.

• After each of the FD and BK commands we must tell
  the turtle a distance to move.
• e.g FD 100 will move the turtle forward 100
  pixels
• After each of the RT and LT commands we must tell
  the turtle an angle to move.
• e.g RT 90 will turn the turtle 90 to its right

4
Steps of Drawing a Square
1) FD 100 RT 90
2) FD 100 RT 90
3) FD 100 RT 90
4) FD 100 RT 90
Quick Way REPEAT 4FD 100 RT 90
5
Steps of Drawing a Triangle
1) FD 100 RT 120
2) FD 100 RT 120
3) FD 100 RT 120
Quick Way REPEAT 3FD 100 RT 120
6
Defining a Hexagon

• TO HEXAGON
• REPEAT 6FD 100 RT 60
• END
• Now we just need to type HEXAGON every time we
  wish to draw a hexagon

7
Drawing Patterns

• We can use defining shapes to draw patterns.
  Following are some examples
• REPEAT 20SQUARE RT 18

8
REPEAT 60PENTAGON RT 6
9
REPEAT 10DECAGON RT 36