645 Checkerboard Karel Answer Verified [extra Quality] -

function start() putBeeper(); fillRow(); while (leftIsOpen()) repositionLeft(); fillRow(); if (rightIsOpen()) repositionRight(); fillRow(); else // Safe exit for odd-rowed worlds turnLeft(); // Fills a single row with alternating beepers function fillRow() while (frontIsOpen()) move(); if (frontIsOpen()) move(); putBeeper(); // Transitions from a right-facing row to a left-facing row above it function repositionLeft() turnLeft(); move(); turnLeft(); if (noBeepersPresent()) putBeeper(); // Transitions from a left-facing row to a right-facing row above it function repositionRight() turnRight(); move(); turnRight(); if (noBeepersPresent()) putBeeper(); Use code with caution. Code Breakdown and Logic

She leaned back, smiled, and whispered, “Good robot, Karel.” 645 checkerboard karel answer verified

The goal is to have Karel place beepers in a checkerboard pattern across the entire world. The pattern must alternate: has a beeper, should not. function start() putBeeper()