So my code is
function start(){ while(frontIsClear()) { move(); } yesWall(); noWall(); } function placeBall() { putBall(); } function yesWall() { while (frontIsBlocked()) { putBall(); turnLeft(); move(); turnRight(); } } function noWall() { while (frontIsClear()) { turnLeft(); move(); turnRight(); yesWall(); } } This makes Karel the Dog place a ball when the frontIsBlocked and moves up. When the front is cleared, he moves up and repeats the yesWall function. However I'm having trouble at the end where he places a ball and then he moves. Which I don't want him to do. I want him to just turnLeft. I've placed a GIF showing what is happening. 
I just don't know what to do now. I know that using the frontIsBlocked condition wasn't a good idea but that was the best I could come up with.
4 Answers
At the point where Karel's hitting the wall, put an if statement.
function yesWall() { while (frontIsBlocked()) { putBall(); turnLeft(); if(frontIsBlocked()){ break; } move(); turnRight(); } } It might help if you went to the wall, then turned left, and went straight, putting balls... like this:
function start() { moveToWall(); decorateFence(); } function moveToWall() { while(frontIsClear()) { move(); } } function decorateFence() { while(frontIsClear()){ //Since karel should not bump into the wall at any cost, put this while front is clear first if(rightIsBlocked()) { putBall(); move(); }else{ move(); //this way, karel is already pointing north, and if the right is blocked(if there's a fence) then a ball is put and karel moves, if there is no fence there, then karel moves anyway. } } Hope this helped!
function start(){ while(frontIsClear()){ move(); } turnLeft(); while(frontIsClear()){ if(rightIsBlocked()){ putBall(); move(); while(rightIsClear()){ move(); } } if(frontIsBlocked()){ putBall(); } } } You could try this:
function start(){ while(frontIsClear()) { move(); } turnLeft(); while(frontIsClear()){ if(rightIsBlocked()){ putBall(); move(); }else{ move(); } } putBall(); } 
