Turn B10L (Commodore Plus/4) by FeCO

*******************
* Turn B10L PUR80 *
*******************

by FeCO, 2025

Basic10Liner Contest, PUR80 Category

Commodore 16/116/232/Plus4

Recommended emulator: Yape

Stay on the stages (total: 7) as long as you can. Avoid collisions to walls and yourself.

On the 7^th stage, the red dots cause reverse the turning direction.

Program Lines:

0: Reads the directions datas A(I), B(I), (the actual datas on the end of 3^rd and 6^th lines) set the colors, and graphic mode, set some variables: T(directions: 1-4,5-8), U(directions set of square playfields), C(„speed”), L(Level), W(wide of the square fields) 

 1: E: (how to change directions) D(intex of directions), Set X, and Y the starting point of the line, and the squares , and make some noise as new level attention. 

 2: Draws the playfield, then display level and points field. 

 3: Main routine: increase and display the actual points, Get the key presses, if „Space” then change the direction, make sound, and check the direction index stays in range. 

 4: Check the direction index for level 7, and draws red points randomly with sound 

 5: Check the movement or collisions, if none, draw the next point, then restart the main routine 

 6: If hit the red point (on level 7) then change the direction (E, sound and border blinks) 

 7: Increase the level (L), - if 1-4 then increase „speed” ( C) and continue draw the stage; - if 5, different draw mode (T=4), seed: slow. .. continues on Line 8.

- if 7+ – game ends, displayt the total points.

8 - if 6 then switch to „char” mode big stage - else 7 set the graphic mode, and cursor starting position

9: draws level 7 field (multicolor) wuth one red dot.