Referenced from lesson Functions for Character Animation (Spring, 2021)

Directions: Use the Design Recipe to write a function update-danger, which takes in the danger’s x-coordinate and produces the next x-coordinate, which is 50 pixels to the left.

Contract and Purpose Statement

Every contract has three parts…​

; _____________:_______->______

; ________________________________________________________

Examples

Write some examples, then circle and label what changes…​

(EXAMPLE (_____________ ____)___________)

(EXAMPLE (_____________ ____)___________)

Definition

Write the definition, giving variable names to all your input values…​

(define (_____________ __)

__________)

Directions: Use the Design Recipe to write a function update-target, which takes in the target’s x-coordinate and produces the next x-coordinate, which is 50 pixels to the right.

Contract and Purpose Statement

Every contract has three parts…​

; _____________:_______->______

; ________________________________________________________

Examples

Write some examples, then circle and label what changes…​

(EXAMPLE (_____________ ____)___________)

(EXAMPLE (_____________ ____)___________)

Definition

Write the definition, giving variable names to all your input values…​

(define (_____________ __)

__________)

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