Page 95 - TP_Plus_v4_Class4
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stamp block creates a duplicate of the current sprite. To see that image,
click on the sprite and drag.
pen up block puts the pen up and stops the sprite from drawing anything.
The sprite draws a non-stop line wherever sprite moves until the pen is
turned off using pen down .
set pen color to block sets the colour of the pen to a colour of your
choice from the drop-down menu.
Change pen color by 10 block changes the pen colour, saturation,
brightness and transparency. Click on the dropdown to
select the pen effects. Click on the text box to give a
value by which you want to change the effect.
set pen color to 50 block will set the pen colour,
saturation, brightness and transparency to the given value.
To view the line in full screen, click on Full Screen Control
button on the top right corner of the stage.
DRAWING POLYGONS IN SCRATCH
Polygons are closed 2D shapes with three or more straight lines and angles. Examples of
polygons are triangle, square, rectangle, quadrilateral, pentagon, octagon, etc.
To draw polygons in Scratch, you must remember a few thumb rules. They are:
Number of sides in the shape
This is the value to be given in repeat block. For example, you give Repeat 3 to draw a
triangle and Repeat 4 to draw a square.
Degree of the angle at the corner
It is very easy to calculate the angle for a polygon. Just divide 360 by the number of sides in the
shape. For example, to draw a triangle, the turn angle will be 360/3 (sides of the triangle) = 120.
Look at these polygons that can be made using Repeat.
Polygon Turn Angle Command
Triangle 360/3=120 Repeat 3 Move 100 Steps Turn 120 degrees
(3 Sides)
Square 360/4=90 Repeat 4 Move 100 Steps Turn 90 degrees
(4 Sides)
Pentagon 360/5=72 Repeat 5 Move 100 Steps Turn 72 degrees
(5 Sides)
#Creating Shapes in Scratch 93

