Logo with Gimmicks

Author

Hubert Baechli

Published

April 18, 2025

Logo

source(here("LOGO_Functions.R"))

Basic Commands

CLEARSCREEN (CS)

Clear the screen and initializing the field

HIDETURTLE (HT)

Don’t show the turtle cursor.

SHOWTURTLE (ST)

Show the turtle cursor.

FORWARD (FD)

Move forward steps.

BACK (BK)

Move back steps.

LEFT (LT)

Turn left this many degrees. Negative degrees work too, they’ll turn it right.

RIGHT (RT)

Turn right this many degrees.

SETHEADING (SH)

Turn to an absolute heading of degrees.

SETPOS (SP)

Set the position to x, y coordinates. These are Cartesian, so 0,0 is the middle of the screen.

HOME

Move back to the home position.

SETPOSX (SPX)

Set the horizontal position to x.

SETPOSY (SPY)

Set the vertical position to y.

Gimmicks

SETPATHCOLOR (SPC)

Set the color of the path.

SETTURTLECOLOR (STC)

Set the color of the turtle.

SETNEWCHUNK (SNC)

Set a new chunk ID for the next Logo-Code

UNDOCHUNK (UNDO)

Undo the last chunk of Logo-Code

SETSPEED (SPEED)

Set the speed of the turtle.

REPLOT

Replot the whole path

SAVESCREEN (SAVE)

Save the whole path as a Gif-File with the given name

QUITLOGO (QUIT)

Quit the application end remove the Logo environment

Run Game

Example from the homepage

with some fancy shadow and color effects

run_LOGO("CS SP [-pi/5] [-Sin(PI/2)/2] sPc [black]")
run_LOGO("REPEAT 20 [RepeaT 180 [FD 1 RT 2] RT 18]")
run_LOGO("SPEED 100")
run_LOGO("Home SpC [gREEN] StC [blue]")
run_LOGO("REPEaT 20.1 [rEPEAT 180 [fD 1 RT 2] RT 18]")
run_LOGO("UndoChunk")
run_LOGO("SpC [blue] StC [green]")
run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]")
run_LOGO("SpC [green] StC [red] rt 18")
run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]")
run_LOGO("SpC [yellow] rt 18")
run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]")
run_LOGO("SpC [red] rt 18 ht")
run_LOGO("REPEaT 5 [rEPEAT 360 [fD 0.5 RT 1] RT 72]")

Saved Output

run_LOGO("SPEED 1 saVe [Logo01]")

Other Exercises

Since n is also used as a loop variable in my program, handling many other exercises doesn’t pose any issues.

https://softwareprogramming4kids.com/loops-in-logo/

Exercise 1:

run_LOGO("CS")
run_LOGO("REPEAT 80 [FD [N*2] RT 90]")
run_LOGO("undo")
run_LOGO("REPEAT 80 [FD [N*2^(N/40)] RT 90]")

run_LOGO("SPEED 1 saVe [Logo02]")

Exercise 2:

run_LOGO("CS REPEAT 50 [ FD [n * 5]  RIGHT 144 ]")

run_LOGO("SPEED 1 saVe [Logo03]")

Exercise 3:

run_LOGO("CS REPEAT 150 [ FD [n * 2]  RT 91 ]")

run_LOGO("SPEED 1 saVe [Logo04]")

--- title: "Logo with Gimmicks" author: "Hubert Baechli" date: "04-18-2025" --- ```{r setup, include=FALSE} knitr::opts_chunk$set(echo = TRUE) library(tidyverse) library(magick) library(here) ``` # Logo ```{r} source(here("LOGO_Functions.R")) ``` ## Basic Commands ### CLEARSCREEN (CS) Clear the screen and initializing the field ### HIDETURTLE (HT) Don't show the turtle cursor. ### SHOWTURTLE (ST) Show the turtle cursor. ### FORWARD (FD) Move forward *steps*. ### BACK (BK) Move back *steps*. ### LEFT (LT) Turn left this many degrees. Negative degrees work too, they'll turn it right. ### RIGHT (RT) Turn right this many degrees. ### SETHEADING (SH) Turn to an absolute heading of *degrees*. ### SETPOS (SP) Set the position to *x, y* coordinates. These are Cartesian, so 0,0 is the middle of the screen. ### HOME Move back to the home position. ### SETPOSX (SPX) Set the horizontal position to *x*. ### SETPOSY (SPY) Set the vertical position to *y*. ## Gimmicks ### SETPATHCOLOR (SPC) Set the *color* of the path. ### SETTURTLECOLOR (STC) Set the *color* of the turtle. ### SETNEWCHUNK (SNC) Set a new chunk ID for the next Logo-Code ### UNDOCHUNK (UNDO) Undo the last chunk of Logo-Code ### SETSPEED (SPEED) Set the speed of the turtle. ### REPLOT Replot the whole path ### SAVESCREEN (SAVE) Save the whole path as a Gif-File with the given *name* ### QUITLOGO (QUIT) Quit the application end remove the Logo environment # Run Game ## Example from the homepage with some fancy shadow and color effects ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("CS SP [-pi/5] [-Sin(PI/2)/2] sPc [black]") run_LOGO("REPEAT 20 [RepeaT 180 [FD 1 RT 2] RT 18]") run_LOGO("SPEED 100") run_LOGO("Home SpC [gREEN] StC [blue]") run_LOGO("REPEaT 20.1 [rEPEAT 180 [fD 1 RT 2] RT 18]") run_LOGO("UndoChunk") run_LOGO("SpC [blue] StC [green]") run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]") run_LOGO("SpC [green] StC [red] rt 18") run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]") run_LOGO("SpC [yellow] rt 18") run_LOGO("REPEaT 5 [rEPEAT 180 [fD 1 RT 2] RT 72]") run_LOGO("SpC [red] rt 18 ht") run_LOGO("REPEaT 5 [rEPEAT 360 [fD 0.5 RT 1] RT 72]") ``` ### Saved Output ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("SPEED 1 saVe [Logo01]") ``` ![](Logo01.gif) ## Other Exercises Since `n` is also used as a loop variable in my program, handling many other exercises doesn't pose any issues. <https://softwareprogramming4kids.com/loops-in-logo/> ### Exercise 1: ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("CS") run_LOGO("REPEAT 80 [FD [N*2] RT 90]") run_LOGO("undo") run_LOGO("REPEAT 80 [FD [N*2^(N/40)] RT 90]") ``` ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("SPEED 1 saVe [Logo02]") ``` ![](Logo02.gif) ### Exercise 2: ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("CS REPEAT 50 [ FD [n * 5] RIGHT 144 ]") ``` ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("SPEED 1 saVe [Logo03]") ``` ![](Logo03.gif) ### Exercise 3: ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("CS REPEAT 150 [ FD [n * 2] RT 91 ]") ``` ```{r, results='hide', message=FALSE, warning=FALSE} run_LOGO("SPEED 1 saVe [Logo04]") ``` ![](Logo04.gif)