Four Player Light Cycles in ZX BASIC

Four Player Light Cycles for the ZX Spectrum, controls are: Q, W: rotate the red light cycleO, P: rotate the green light cycleN, M: rotate the blue light cycleZ, X: rotate the yellow light cycleHeres how it works:Line 10 - draw the border of the arena and set up the increments for movementLine 20 - set up the initial position / colour / controls for each cycleLine 30 - loop through all live cyclesLine 40 - display cycle trail, update cycle position, check for collisionLine 50 - display cycle, ch...